3000/4000

OPERATOR’S
MANUAL

MAY 2008
 2008 MAY
Operator’s
Manual OM3752EN

Allison Transmission
VOCATIONAL MODELS
Rugged Duty Series (RDS) Transmissions
3000 and 4000 Product Families
WTEC III Controls, Allison 4th Generation Controls,
and Model Year 2009 Prognostics

3000 RDS
3500 RDS
4000 RDS
4500 RDS
4700 RDS

Printed in USA Copyright © 2008 Allison Transmission, Inc.

NOTES

2
 TABLE OF CONTENTS

INTRODUCTION
KEEPING THAT ALLISON ADVANTAGE . . . . . . . . . . . . . . . . . . . . . . . . 7
A BRIEF DESCRIPTION OF THE ALLISON TRANSMISSION . . . . . . . . . . 15
WTEC III ELECTRONIC CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . 15
ALLISON 4TH GENERATION ELECTRONIC CONTROL SYSTEM . . . . . . . 16
ALLISON 4TH GENERATION MODEL YEAR 2009 PROGNOSTICS
FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TORQUE CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PLANETARY GEARS AND CLUTCHES . . . . . . . . . . . . . . . . . . . . . . . . 20
COOLER CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
RETARDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

SHIFT SELECTORS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DESCRIPTION OF AVAILABLE WTEC III SHIFT SELECTOR TYPES . . . . . 22
DESCRIPTION OF AVAILABLE ALLISON 4TH GENERATION
SHIFT SELECTOR TYPES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DESCRIPTION OF AVAILABLE ALLISON 4TH GENERATION MY09
PROGNOSTICS SHIFT SELECTOR TYPES . . . . . . . . . . . . . . . . . . . . . . 33
RANGE SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

DRIVING TIPS
CHECK TRANS LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
DIAGNOSTIC CODES OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
WTEC III DIAGNOSTIC CODE DISPLAY PROCEDURE . . . . . . . . . . . . . . 46
ALLISON 4TH GENERATION CONTROLS DIAGNOSTIC CODE DISPLAY
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
ALLISON 4TH GENERATION MY09 PROGNOSTICS DIAGNOSTIC CODE
DISPLAY PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
ACCELERATOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
RANGE SHIFTS AND INHIBITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
USING THE ENGINE TO SLOW THE VEHICLE . . . . . . . . . . . . . . . . . . . 54
USING THE HYDRAULIC RETARDER . . . . . . . . . . . . . . . . . . . . . . . . . 55
RANGE PRESELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
COLD WEATHER STARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
DRIVING ON SNOW OR ICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
ROCKING OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
HIGH FLUID TEMPERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
PARKING BRAKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
TOWING OR PUSHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
TURNING OFF THE VEHICLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3
 PRIMARY/SECONDARY SHIFT SCHEDULES . . . . . . . . . . . . . . . . . . . . 63
CRUISE CONTROL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
OPERATING DOWN STEEP GRADES
(REAR-DISCHARGE MIXER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

POWER TAKEOFF OPERATION

ENGINE-DRIVEN POWER TAKEOFF (PTO) . . . . . . . . . . . . . . . . . . . . . 65

CARE AND MAINTENANCE

PERIODIC INSPECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
PREVENT MAJOR PROBLEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
IMPORTANCE OF PROPER FLUID LEVEL . . . . . . . . . . . . . . . . . . . . . . 67
WTEC III FLUID LEVEL CHECK USING ALLISON SHIFT SELECTORS . . . 67
ALLISON 4TH GENERATION MY09 PROGNOSTICS DISABLED AND SEVEN
SPEED TRANSMISSION FLUID LEVEL CHECK USING ALLISON SHIFT
SELECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
PROGNOSTICS FUNCTIONALITY FOR MODEL YEAR 2009 . . . . . . . . . . 73
ALLISON 4TH GENERATION MY09 PROGNOSTICS ENABLED FLUID LEVEL
CHECK USING ALLISON SHIFT SELECTORS . . . . . . . . . . . . . . . . . . . . 76
FLUID LEVEL CHECK USING DIAGNOSTIC TOOLS . . . . . . . . . . . . . . . 82
MANUAL FLUID CHECK PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . 83
COLD CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
HOT CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
RECOMMENDED AUTOMATIC TRANSMISSION FLUID AND VISCOSITY
GRADE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
KEEPING FLUID CLEAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
WTEC III, ALLISON 4TH GENERATION, AND MY09 PROGNOSTICS
DISABLED FLUID AND INTERNAL FILTER CHANGE INTERVAL
RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
ALLISON 4TH GENERATION MY09 PROGNOSTICS ENABLED FLUID AND
FILTER CHANGE INTERVAL RECOMMENDATIONS . . . . . . . . . . . . . . . 95
FLUID ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
REFILL TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

DIAGNOSTICS
DIAGNOSTIC CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

CUSTOMER SERVICE
OWNER ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
SERVICE LITERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
ALLISON TRANSMISSION DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . 104

4
 TRADEMARK USAGE
The following trademarks are the property of the companies indicated:
• Allison DOC™ is a trademark of General Motors Corporation.
• DEXRON® is a registered trademark of the General Motors Corporation.

5
 WARNINGS, CAUTIONS, NOTES
IT IS YOUR RESPONSIBILITY to be completely familiar with the warnings
and cautions described in this manual. It is, however, important to understand that
these warnings and cautions are not exhaustive. Allison Transmission could not
possibly know, evaluate, and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each
way. The vehicle manufacturer is responsible for providing information related to
the operation of vehicle systems (including appropriate warnings, cautions, and
notes). Consequently, Allison Transmission has not undertaken any such broad
evaluation. Accordingly, ANYONE WHO USES A SERVICE PROCEDURE
OR TOOL WHICH IS NOT RECOMMENDED BY ALLISON
TRANSMISSION OR THE VEHICLE MANUFACTURER MUST first be
thoroughly satisfied that neither personal safety nor equipment safety will be
jeopardized by the service methods selected.
Proper service and repair is important to the safe, reliable operation of the
equipment. The service procedures recommended by Allison Transmission (or the
vehicle manufacturer) and described in this manual are effective methods for
performing service operations. Some of these service operations require the use of
tools specially designed for the purpose. The special tools should be used when
and as recommended.
Three types of headings are used in this manual to attract your attention. These
warnings and cautions advise of specific methods or actions that can result in
personal injury, damage to the equipment, or cause the equipment to become
unsafe.

WARNING: A warning is used when an operating procedure, practice,

etc., if not correctly followed, could result in personal injury or loss of
life.

CAUTION: A caution is used when an operating procedure, practice,

etc., if not strictly observed, could result in damage to or destruction of
equipment.

NOTE: A note is used when an operating procedure, practice, etc., is

essential to highlight.

6
 INTRODUCTION

KEEPING THAT ALLISON ADVANTAGE

Rugged Duty Series (RDS) transmissions are rugged and designed to provide
long, trouble-free service. All Rugged Duty Series transmissions are available with
optional retarders and engine driven PTO provisions.
This handbook will help the operator gain the maximum benefits from a Rugged
Duty Series transmission-equipped vehicle.

7
 Abbreviations

ABS Anti-lock Brake System

DMD Display Mode/Diagnostic
DOC Diagnostic Trouble Code
DTC Diagnostic Optimized Connection
ECU Electronic Control Unit
EMI Electromagnetic Interference
FCC Federal Communications Commission
FM Filter Life Monitor
I/O Input/Output
KOH Potassium Hydroxide
MIL Military Specifications
MY09 Model Year 2009
OEM Original Equipment Manufacturer
OLS Oil Level Sensor
OM Oil Life Monitor
PTO Power Takeoff
PWM Pulse Width Modulated
RDS Rugged Duty Series
RFI Radio Frequency Interference
RMR Retarder Modulation Request
TAN Total Acid Number
TCM Transmission Control Module
TM Transmission Health Monitor
TPS Throttle Position Sensor
WTEC World Transmission Electronic Control

8
Your Allison transmission has one of three electronic control systems: WTEC III,
Allison 4th Generation Controls, or Allison 4th Generation MY09 Prognostics
Controls. The current electronic control system being offered is Allison 4th
Generation MY09 Prognostics Controls. The MY09 Prognostics functions of this
control system are explained in Section 3, DRIVING TIPS and Section 5, CARE
AND MAINTENANCE. The operation of the shift selectors is explained in
Section 2, SHIFT SELECTORS.
Refer to the shift selectors shown in Figure 1 through Figure 3 to identify which
system is installed in your transmission. The WTEC III Controls shift selectors
have a single LED digital display (refer to Figure 1). The Allison 4th Generation
Controls shift selectors have two LED digital displays (refer to Figure 2). The
Allison 4th Generation MY09 Prognostics Controls shift selectors have two LED
digital displays and a service icon in the form of an open-end wrench between the
digital displays (refer to Figure 3).

SINGLE DIGIT LED DISPLAY

R
R MODE
MODE N
N
R MODE D
R MODE D
5
5
N 4

N 4
3
3

D 2
2

D 1
1

WTEC III CONTROLS V07344.00.01

Figure 1. Typical Allison WTEC III Controls Shift Selectors With Single
Digital Display

9
 DOUBLE DIGIT LED DISPLAY

MODE
R 6
N
D
1
6 5
6
1 4 1
3
2
1

ALLISON 4TH GENERATION CONTROLS V07344.01.01

Figure 2. Typical Allison 4th Generation Controls Shift Selectors With

SELECT And MONITOR Digital Displays

DOUBLE DIGIT LED DISPLAY

WITH SERVICE ICON

R
MODE

R MODE
R MODE
N
D
N N 5
4
D D 3
2
1

ALLISON 4TH GENERATION MY09 PROGNOSTICS CONTROLS

V11059.00.01

Figure 3. Typical Allison 4th Generation MY09 Prognostics Controls

Shift Selectors With SELECT And MONITOR Digital Displays and
Service Icon (open-end wrench)

10
BREATHER
ASSEMBLY PADS

FEEDTHROUGH
HARNESS
CONNECTOR

OUTPUT
SPEED
SENSOR

RETARDER
VALVE BODY
CONNECTOR

MAIN-PRESSURE TAP
NOTE: Inch Series Threads

TACHOGRAPH PROVISION COOLER PORTS

NOTE: Metric Series Threads NOTE: Inch Series Threads

LEFT-REAR VIEW
BREATHER ASSEMBLY PADS
(BOTH SIDES)
TORQUE CONVERTER OUTPUT
WITH LOCKUP CLUTCH RETARDER
AND TORSIONAL DAMPER

TO RETARDER
ACCUMULATOR

OIL FILL TUBE AND

DIPSTICK
(AVAILABLE ON
MAIN-PRESSURE TAP BOTH SIDES)
NOTE: Inch series threads

LEFT-FRONT VIEW V07307.03.00

Figure 4. 3000/3500 RDS With Retarder

(WTEC III Controls)
11
 RETARDER PTO (TOP RIGHT POSITION)

FEEDTHROUGH MOUNTING PADS

HARNESS (BOTH SIDES)
CONNECTOR

NAMEPLATE

FILL TUBE

TURBINE SPEED
SENSOR
ENGINE SPEED SENSOR

RIGHT-FRONT VIEW

BREATHER MOUNTING PADS

(BOTH SIDES)

PTO (TOP RIGHT POSITION)

MOUNTING PADS FEEDTHROUGH
(BOTH SIDES) HARNESS
CONNECTOR

RETARDER

PTO (BOTTOM LEFT

POSITION)

MAIN-PRESSURE TAP
COOLER PORTS

LEFT-REAR VIEW V07309.00.03

Figure 5. 4000/4500 RDS With PTO And Retarder

(WTEC III Controls)

12
BREATHER
ASSEMBLY PADS

OUTPUT
SPEED
SENSOR
RETARDER
VALVE BODY
CONNECTOR

MAIN-PRESSURE TAP
NOTE: Inch Series Threads

TACHOGRAPH PROVISIO N COOLER PORTS

NOTE: Metric Series Threads NOTE: Inch Series Threads

BREATHER ASSEMBLY PADS

(BOTH SIDES)
TORQUE CONVERTER
WITH LOCKUP CLUTCH OUTPUT
AND TORSIONAL DAMPER RETARDER

TO RETARDER
ACCUMULATOR

OIL FILL TUBE AND

DIPSTICK
(AVAILABLE ON
MAIN-PRESSURE TAP BOTH SIDES )
NOTE: Inch series threads

V07307.02.00

Figure 6. 3000/3500 RDS With Retarder

(Allison 4th Generation Controls)

13
 PTO PROVISION
(TOP RIGHT POSITION)

FILL TUBE

RETARDER
TEMPERATURE
CONNECTOR
SOLENOID TORQUE
CONNECTOR CONVERTER
MODULE
NAMEPLATE

TURBINE-SPEED
SENSOR
MOUNTING PAD ENGINE-SPEED SENSOR

RIGHT-FRONT VIEW

BREATHER MOUNTING PADS

(BOTH SIDES)

PTO PROVISION
MOUNTING PADS
(BOTH SIDES)
STANDARD
REAR
COVER

PTO PROVISION

MAIN-PRESSURE TAP COOLER PORTS

LEFT-REAR VIEW
V10695.00.01

Figure 7. 4000/4500 RDS With PTO

(Allison 4th Generation Controls)

14
A BRIEF DESCRIPTION OF THE ALLISON TRANSMISSION
The Allison transmissions (refer to Figure 4 through Figure 7) described in this
manual include:
• WTEC III Controls or Allison 4th Generation Controls
• Allison 4th Generation MY09 Prognostics (not available on earlier model
years)
• A torque converter with lockup clutch and torsion damper
• Three planetary gear sets (four for 4700 RDS)
• Five clutches (six for 4700 RDS)
An integral retarder is available as an option on all transmissions. A provision to
mount a power takeoff (PTO) is available as an option on all transmissions.

NOTE: Allison electronic controls are designed and manufactured to

comply with all FCC and other guidelines regarding radio frequency
interference/electromagnetic interference (RFI/EMI) for transportation
electronics. Manufacturers, assemblers, and installers of radio-telephone
or two-way communication radios have the sole responsibility to
correctly install and integrate those devices into Allison
transmission-equipped vehicles to customer satisfaction.

The TCM/ECU is programmed to provide the most suitable operating

characteristics for a specific application. This manual does not attempt to describe
all of the possible combinations. The information contained herein describes only
the operating characteristics most frequently requested by vehicle manufacturers.

WTEC III ELECTRONIC CONTROL SYSTEM

WTEC III electronic controls consist of the following major Allison Transmission
components connected by OEM-furnished wiring harnesses:
• Electronic Control Unit (ECU)
• Three speed sensors (refer to Figure 4 through Figure 7)
— Input
— Turbine
— Output
• Remote shift selector
• Control module which includes:
— Solenoids
— C3 pressure switch
— Oil level sensor (OLS)—The oil level sensor (OLS) is optional on all
3000 and 4000 Product Families transmissions.

15
 — Sump temperature sensor
— Valves
— Internal wiring harnesses
• Optional Allison Throttle Position Sensor (TPS)
The ECU processes information and then sends signals to actuate specific
solenoids located in the control module. These solenoids control clutch pressures
to provide closed-loop control. The closed-loop control makes “during shift”
adjustments. These adjustments in shift characteristics are based on vehicle
conditions such as grade, load, and engine power. After a shift is completed, the
ECU compares the shift to an “ideal” shift profile in the ECU calibration and
makes adjustments before the next shift of the same kind is made. This is
“adaptive logic” which establishes initial conditions for shifts.
The WTEC III ECU has an “autodetect” feature. Autodetect is active within the
first 30 seconds of the first 24 engine starts or 49 engine starts, depending upon
the component or sensor being detected. Autodetect searches for the presence of
the following transmission components or data inputs.

Retarder Present, Not Present

Oil Level Sensor (OLS) Present, Not Present
Throttle* Analog, J1587, J1939
Engine Coolant Temperature Analog, J1587, J1939
* A pulse width modulated (PWM) throttle source is not “autodetected.” This source requires a
unique calibration or can be manually selected using Allison DOC™ For PC–Service Tool.

Even though autodetect has been completed, it can be reset to monitor an

additional group of engine starts. Reset may be necessary if a device known to be
present is not detected or if an autodetectable component or sensor was added
after the initial vehicle build.
Reset is accomplished by using the Allison DOC™ For PC–Service Tool. The
Allison DOC™ For PC–Service Tool may also be used to override autodetect and
manually enter the component or sensor to be recognized by the ECU by changing
appropriate “customer modified constants.”

ALLISON 4TH GENERATION ELECTRONIC CONTROL

SYSTEM
Allison 4th Generation Controls consist of the following major components
connected by an OEM-furnished wiring harness:
• Transmission Control Module (TCM)
• Three speed sensors (refer to Figure 4 through Figure 7):
— Input
— Turbine

16
 — Output
• Remote shift selector
• Control module which includes:
— Solenoids
— Diagnostic pressure switch
— Oil level sensor (standard on the 3000 and 4000 Product Family
transmissions through six-speed and optional on the 4700 RDS)
— Sump temperature sensor
— Valves
— Internal wire harnesses
• Optional Allison Throttle Position Sensor (TPS)
The TCM processes information and then sends signals to actuate specific
solenoids located in the control module. These solenoids control clutch pressures
to provide closed-loop control. The closed-loop control makes “during shift”
adjustments. These adjustments in shift characteristics are based on vehicle
conditions such as grade, load, and engine power. After a shift is completed, the
TCM compares the shift to an “ideal” shift profile in the TCM calibration and
makes adjustments before the next shift of the same kind is made. This is
“adaptive logic” which establishes initial conditions for shifts.
The Allison 4th Generation Control has an “autodetect” feature. Autodetect is
active within the first 30 seconds of the first 24 engine starts or 49 engine starts,
depending upon the component or sensor being detected. Autodetect searches for
the presence of the following transmission components or data inputs.

Retarder Present, Not Present

Oil Level Sensor (OLS) Present, Not Present
Throttle* Analog, J1587, J1939
Engine Coolant Temperature Analog, J1587, J1939
* A pulse width modulated (PWM) throttle source is not “autodetected.” This source requires a
unique calibration or can be manually selected using Allison DOC™ For PC–Service Tool.

Even though autodetect has been completed, it can be reset to monitor an

additional group of engine starts. Reset may be necessary if a device known to be
present is not detected or if an autodetectable component or sensor was added
after the initial vehicle build.
Reset is accomplished by using the Allison DOC™ For PC–Service Tool. The
Allison DOC™ For PC–Service Tool may also be used to override autodetect and
manually enter the component or sensor to be recognized by the TCM by
changing appropriate “customer modified constants.”

17
ALLISON 4TH GENERATION MODEL YEAR 2009
PROGNOSTICS FUNCTIONS
Allison Transmission, Inc. has introduced three new diagnostic parameters that are
available only on 3-, 4-, 5-, and 6-speed transmissions for Model Year 2009
(MY09). These new diagnostic parameters will provide indicators of required
maintenance actions and are named “Prognostics” because they predict required
transmission maintenance. These new Prognostics include the following:
• Oil Life Monitor (OM)
• Filter Life Monitor (FM)
• Transmission Health Monitor (TM)
Prognostics are designed to maximize fluid (the terms oil and fluid are used
interchangeably) and filter utilization and provide an early indication of clutch
system concerns so that an inspection may be scheduled before a clutch fails and
causes other transmission damage.
The following items are required to allow MY09 Prognostics:
• Allison approved TES 295 transmission fluid and Allison High Capacity
Filters.
• Transmission with filter life valve body and pressure switch.
• MY09 TCM.
• Filter pressure switch wiring in the OEM wiring harness from the
transmission to the TCM.
• MY09 Allison pushbutton or lever shift selector or an OEM installed shifter
plus a service indicator light or J1939 text message display. The OEM
service indicator light may also be used with a J1939 text messaging
display.
Allison MY09 shift selectors contain an integrated service icon in the shape of an
open-end wrench located between the SELECT and MONITOR displays (refer to
DESCRIPTION OF AVAILABLE TYPES in the SHIFT SELECTOR section).
The vehicle manufacturer specifies whether the Allison Prognostics Feature is
made available in the calibration and, if so, whether the Prognostic function is
defaulted ON or OFF for customer use. The transmission calibration can be made
for the vehicle manufacturer (or the customer) so that the prognostics feature is in
one of the following states:
• Available and the function is defaulted ON
• Available but the function is defaulted OFF

NOTE: An Allison service outlet can assist with programming

Prognostics ON at customer expense if Allison requirements are met
prior to Prognostics features being turned ON.

18
 • Not available in the transmission calibration.

NOTE: An Allison service outlet can assist with a transmission

calibration change so that MY09 Prognostics are available at customer
expense if Allison requirements are met prior to TCM recalibration.

The three Prognostics functions are enabled or disabled as a group and cannot be
enabled or disabled individually. The OEM may also specify whether Prognostics
may be reset by the Allison shift selector, J1939 message, or only with the use of
the Allison DOC™ For PC–Service Tool.

CAUTION: Prognostics requires the use of Allison approved

TES 295 fluids and Allison High Capacity Filters if turned ON. If
any other fluids or filters are used, the Prognostics feature MUST BE
turned OFF. Prognostics information will not be accurate with any other
transmission fluids and could result in missed maintenance activities
resulting in transmission damage. If Prognostics functions are not
programmed or are turned OFF, refer to the miles/hours/months fluid
and filter change interval charts in the CARE AND MAINTENANCE
section or visit www.allisontransmission.com, click Service, Fluid/Filter
Change Interval, then Fluids, and read the current revision of Service
Tips 1099 for details.

The Allison 4th Generation Controls has an “autodetect” feature. Autodetect is

active within the first 30 seconds of the first 24 engine starts or 49 engine starts,
depending upon the component or sensor being detected. Autodetect searches for
the presence of the following transmission components or data inputs.

Retarder Present, Not Present

Oil Level Sensor (OLS) Present, Not Present
Throttle* Analog, J1587, J1939
Engine Coolant Temperature Analog, J1587, J1939
* A pulse width modulated (PWM) throttle source is not “autodetected.” This source requires a
unique calibration or can be manually selected using Allison DOC™ For PC–Service Tool.

Even though autodetect has been completed, it can be reset to monitor an

additional group of engine starts. Reset may be necessary if a device known to be
present is not detected or if an autodetectable component or sensor was added
after the initial vehicle build.
Reset is accomplished by using the Allison DOC™ For PC–Service Tool. The
Allison DOC™ For PC–Service Tool may also be used to override autodetect and
manually enter the component or sensor to be recognized by the TCM by
changing appropriate “customer modified constants.”

19
TORQUE CONVERTER
The torque converter consists of the following four elements:
• Pump—input element driven directly by the engine
• Turbine—output element hydraulically driven by the pump
• Stator—reaction (torque multiplying) element
• Lockup Clutch—mechanically couples the pump and turbine when engaged;
controlled by TCM/ECU
When the pump turns faster than the turbine and the stator is stationary, the torque
converter is multiplying torque. When the turbine approaches the speed of the
pump, the stator starts to rotate with the pump and turbine. When this occurs,
torque multiplication stops and the torque converter functions as a fluid coupling.
The lockup clutch is located inside the torque converter and consists of the
following elements:
• Piston and backplate—driven by the engine
• Clutch plate/damper (located between the piston and the
backplate)—splined to the converter turbine
The lockup clutch/torsional damper is engaged and released in response to
electronic signals from the TCM/ECU. Lockup clutch engagement provides a
direct drive from the engine to the transmission input. This eliminates converter
slippage and maximizes fuel economy and vehicle speed. The lockup clutch
releases at lower speeds or when the TCM/ECU detects conditions requiring it to
be released.
The torsional damper tries to absorb engine torsional vibration to attempt to
prevent transmitting engine torsional vibration on through to transmission
components (clutches, etc), or items bolted to the transmission (PTO, etc.).

PLANETARY GEARS AND CLUTCHES

A series of three helical, constant mesh planetary gear sets (four for 4700 RDS)
and shafts provides the mechanical gear ratios and direction of travel for the
vehicle. The planetary gear sets are controlled by five multi-plate clutches (six for
4700 RDS) that work in pairs to produce up to six forward speeds (seven for
4700 RDS) and one reverse speed. The clutches are applied and released
hydraulically in response to electronic signals from the TCM/ECU to the
appropriate solenoids.

COOLER CIRCUIT
The transmission fluid is cooled by an integral (transmission-mounted) or
remote-mounted oil cooler. Connections to the cooling circuit are located at the
front or rear of the transmission to facilitate installation of remote cooler lines. On
retarder models, only the rear cooler ports may be used. The integral cooler is

20
mounted on the lower rear portion of the transmission, replacing the remote cooler
manifold. Integral cooler oil ports are internal requiring coolant to be routed to
and from the cooler.
The retarder housing allows the addition of either a remote or integral cooler for
transmission sump fluid in addition to retarder out fluid. A bypass cover is placed
over the sump cooling ports when the provision is not used. The sump cooler
ports are located on the lower right rear face of the retarder housing (refer to
Figure 4 through Figure 7).

RETARDER
The self-contained retarder is at the output of the transmission and consists of a
vaned rotor which rotates in a vaned cavity. The rotor is splined to and driven by
the output shaft. When the retarder is activated, the fluid in the accumulator is
displaced into the retarder cavity. The pressurized fluid in the cavity acting against
the rotating and stationary vanes causes the retarder rotor and output shaft to
reduce speed, slowing the vehicle or limiting speed on a downhill grade. Refer to
USING THE HYDRAULIC RETARDER for additional information.
When the retarder is deactivated, the retarder cavity is evacuated and the
accumulator is recharged with fluid.

21
 SHIFT SELECTORS

INTRODUCTION
Vehicle manufacturers may choose different types of shift selectors for their
vehicles. The shift selector in your Allison-equipped vehicle will be similar to one
of the pushbutton or lever styles (refer to Figure 8 through Figure 10) shown in
the following sections that explain each Allison shift selector.
Allison transmissions can be programmed to have up to six (seven for 4700 RDS)
forward ranges. Shift selector positions should agree with the programming of the
TCM/ECU.
With an Allison-equipped vehicle, it is not necessary to select the right moment to
upshift or downshift during changing road and traffic conditions. The Allison
transmission does it for you. However, knowledge of the shift selector positions,
available ranges, and when to select them make vehicle control and your job even
easier. To reduce wear on service brakes, select lower ranges when descending
long grades (with or without retarder). Refer to the Range Selection table at the
end of this section for related information.

DESCRIPTION OF AVAILABLE WTEC III SHIFT SELECTOR

TYPES
LEVER SHIFT SELECTOR.
General Description. The Allison lever shift selector (refer to Figure 8) is an
electromechanical control. Typical lever positions are:
• R (Reverse)
• N (Neutral)
• D (Drive)
• Some number of lower forward range positions
Allison transmissions can be programmed to have up to six (seven for 4700 RDS)
forward ranges. Shift selector positions should agree with the programming of the
ECU unit.

22
The lever shift selector includes the following:
• HOLD OVERRIDE button
• MODE button
• Digital display
• DISPLAY MODE/DIAGNOSTIC button

HOLD OVERRIDE BUTTON HOLD OVERRIDE

BUTTON
MODE INDICATOR
MODE INDICATOR
(LED)
(LED) R
1
2
MODE MODE BUTTON MODE
R
N
MODE
N

3 D MODE BUTTON D
5
4
MODE ID 6
5
MODE ID 4
5
3
D 4
N DIGITAL DISPLAY* 3 DIGITAL DISPLAY* 2
1
R 2
1

DISPLAY MODE/ DISPLAY MODE/

DIAGNOSTIC BUTTON DIAGNOSTIC BUTTON
SIX-SPEED, SEVEN-SPEED,
CONTOURED
LEFT-HAND RIGHT-HAND
BEZEL
LEVER SELECTOR LEVER SELECTOR
WITH REVERSE WITH REVERSE
IN REAR TO FRONT

DIGITAL DISPLAY*
MODE ID
MODE INDICATOR (LED)
R MODE
R MODE
MODE BUTTON
N
N
Push simultaneously D
D to enter diagnostic
mode and fluid
level check

PUSHBUTTON SELECTORS
* NOTE: Number displayed is highest forward range available in selected position.
Visually check to confirm that the range selected was attained.
If display is flashing, shift is inhibited.
V10689.00.01

Figure 8. Typical WTEC III Allison Shift Selectors

Hold Override Button. The lever shift selector has three locked positions to
prevent accidentally selecting R (Reverse), N (Neutral), or D (Drive). Select
R (Reverse), N (Neutral), or D (Drive) by pressing the HOLD OVERRIDE
button and moving the lever to the desired position. Once D (Drive) is selected,
lower forward range positions may be selected without pressing the
HOLD OVERRIDE button.
MODE Button. The MODE button can allow the driver to enable a secondary
shift schedule, PTO enable, or other special functions that have been programmed
into the ECU unit at the request of the OEM. For example, a vehicle OEM may

23
have provided a secondary shift schedule for improved fuel economy. The name
of the special function (ECONOMY) appears on the MODE ID label adjacent to
the MODE button. Pressing the MODE button activates the ECONOMY shift
schedule and illuminates the MODE INDICATOR LED.
When the Diagnostic Display Mode has been entered, the MODE button is used
to view and toggle through diagnostic code information. The code displayed is
active if the MODE INDICATOR (LED) is illuminated.

NOTE: Visually observe the digital display whenever the lever is

moved. N should appear in the digital display if the lever was moved to
N.

Digital Display. The digital display is a single digit display. During normal
operation, if D (Drive) is selected, the digital display shows the highest forward
range attainable for the shift schedule in use.
Limited transmission operation can be expected if the selector display shows these
conditions:
• When the single digital display is illuminated for more than 12 seconds, the
ECU did not complete initialization.
• When the single digital display is blank, there is no power to the selector.
• When the display shows a \/\ (cateyes), a selector-related fault code has
been logged.
• When the display shows R or D has been requested and the display is
flashing the selected range, the selected range has not been attained due to
an inhibit function. Refer to RANGE SHIFTS AND INHIBITS in the
DRIVING TIPS section.
• An inhibited range, shown by a flashing display, does not indicate that a
DTC has set. An inhibit means there is a vehicle or engine condition that
won’t allow range selection or a direction change such as:
— Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range attainment.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

24
Conditions which illuminate the CHECK TRANS light disable the shift selector
and the digital display will show the actual range attained instead of range
selected. Refer to CHECK TRANS LIGHT in the DRIVING TIPS section for a
detailed explanation.
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.
Display Mode/Diagnostic Button. The DISPLAY MODE/DIAGNOSTIC button
allows access to fluid level information and diagnostic code information.
• Move the shift lever to N and apply the parking brake.
• Press the DISPLAY MODE/DIAGNOSTIC (DMD) button once to access
oil level information (if an OLS is installed).
• Press the DMD again to access the diagnostic code information.
• Press the MODE button to view subsequent code positions d2 through d5.
• To exit the diagnostic code mode, press the DMD.
PUSHBUTTON SHIFT SELECTOR.
General Description. The pushbutton shift selector (refer to Figure 8) has the
following components:
• R (Reverse)—Press this button to select Reverse
• N (Neutral)—Press this button to select Neutral
• D (Drive)—Press this button to select Drive. The highest forward range
available will appear in the digital display window. The transmission will
start out in the lowest available forward range and advance automatically to
the highest range.
• ↑ (Up) Arrow—Press the ↑ (Up) Arrow when in D (Drive) to request the
next higher range. Continually pressing the ↑ (Up) Arrow will request the
highest range available.
• ↓ (Down) Arrow—Press the ↓ (Down) Arrow when in D (Drive) to
request the next lower range. Continually pressing the ↓ (Down) Arrow
will request the lowest range available.
• MODE Button—The MODE button can allow the driver to enable a
secondary shift schedule, PTO enable, or other special functions that have
been programmed into the ECU unit at the request of the OEM. For
example, a vehicle OEM may have provided a secondary shift schedule for
improved fuel economy. The name of the special function (ECONOMY)
appears on the MODE ID label adjacent to the MODE button. Pressing the
MODE button activates the ECONOMY shift schedule and illuminates the
MODE INDICATOR LED. When the Diagnostic Display Mode has been
entered, the MODE button is used to view and toggle through diagnostic
code information. The code displayed is active if the MODE INDICATOR
LED is illuminated.
Digital Display. During normal operation, if D (Drive) is selected, the digital
display shows the highest forward range attainable for the shift schedule in use.

25
Limited transmission operation can be expected if the selector display shows these
conditions:
• When the single digital display is illuminated for more than 12 seconds, the
ECU did not complete initialization.
• When the single digital display is blank, there is no power to the selector.
• When the display shows a \/\ (cateye), a selector-related fault code has been
logged.
• When the display shows R or D has been requested and the display is
flashing the selected range, then the selected range has not been attained
due to an inhibit function. Refer to RANGE SHIFTS AND INHIBITS in
the DRIVING TIPS section.
• An inhibited range, shown by a flashing display, does not indicate that a
DTC has set. An inhibit means there is a vehicle or engine condition that
won’t allow range selection or direction change such as:
— Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range attainment.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

Conditions which illuminate the CHECK TRANS light disable the shift selector
and the digital display will show the actual range attained instead of range
selected. Refer to CHECK TRANS LIGHT in the DRIVING TIPS section for a
detailed explanation.
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.

NOTE: The oil level sensor (OLS) is an optional feature on WTEC III
transmissions.

To display stored codes, do the following:

• Select N and apply the parking brakes.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons once
to access oil level information (if an OLS is installed).
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access diagnostic codes.

26
 • Press the MODE button to display the next code. Repeat for code positions
d3 through d5.
• Press N (Neutral) to exit the diagnostic code mode.
Refer to the CARE AND MAINTENANCE section, FLUID LEVEL CHECK
USING PUSHBUTTON OR LEVER SHIFT SELECTOR, for more information
about fluid level data. Refer to the DRIVING TIPS section, DIAGNOSTIC
CODES DISPLAY PROCEDURE, for more information about diagnostic codes
and display procedure.

DESCRIPTION OF AVAILABLE ALLISON 4TH GENERATION

SHIFT SELECTOR TYPES
NOTE: This section is for Allison 4th Generation Controls, Model Year
2009 Prognostics DISABLED, and seven-speed transmissions which
don’t have Prognostics.

27
 HOLD OVERRIDE
BUTTON HOLD OVERRIDE
MODE ID BUTTON

MODE INDICATOR MODE INDICATOR

(LED) (LED)
1 R
2 N
3 MODE BUTTON D MODE BUTTON
4 6 7 6
6
5
5
1 1 4 1
D
3 DIGITAL DISPLAY*
N
R DIGITAL DISPLAY * 2
1

DISPLAY MODE DISPLAY MODE

DIAGNOSTIC BUTTON DIAGNOSTIC BUTTON
SIX-SPEED, SEVEN-SPEED, CONTOURED
LEFT-HAND RIGHT-HAND BEZEL
LEVER SELECTOR LEVER SELECTOR
WITH REVERSE WITH REVERSE
TO REAR TO FRONT

DIGITAL DISPLAY *
MODE ID
7 1
MODE 6
MODE
INDICATOR (LED) 1
MODE BUTTON
Push simultaneously
to enter diagnostic
mode and fluid
level check

PUSHBUTTON SELECTORS
* NOTE: The first number displayed in the digital display is the highest forward range available and
second number is range attained in selected position.
Visually confirm that the range selected was attained. If display is flashing, shift is inhibited. V10694.00.01

Figure 9. Typical Allison 4th Generation Controls Shift Selectors

LEVER SHIFT SELECTOR.
General Description. The Allison 4th Generation lever shift selector (refer to
Figure 9) is an electromechanical control. Typical lever positions are:
• R (Reverse)
• N (Neutral)
• D (Drive)
• Some number of lower forward range positions
Allison transmissions can be programmed to have up to six (seven for 4700 RDS)
forward ranges. Shift selector positions should agree with the programming of the
TCM.
The lever shift selector includes the following:
• HOLD OVERRIDE button
• MODE button

28
 • Digital display
• DISPLAY MODE/DIAGNOSTIC button
Hold Override Button. The lever shift selector has three locked positions to
prevent accidentally selecting R (Reverse), N (Neutral), or D (Drive). Select
R (Reverse), N (Neutral), or D (Drive) by pressing the HOLD OVERRIDE
button and moving the lever to the desired position. Once D (Drive) is selected,
lower forward range positions may be selected without pressing the
HOLD OVERRIDE button.
MODE Button. The MODE button can allow the driver to enable a secondary
shift schedule, PTO enable, or other special functions that have been programmed
into the TCM unit at the request of the OEM. For example, a vehicle OEM may
have provided a secondary shift schedule for improved fuel economy. The name
of the special function (ECONOMY) appears on the MODE ID label adjacent to
the MODE button. Pressing the MODE button activates the ECONOMY shift
schedule and illuminates the MODE INDICATOR LED.
When the Diagnostic Display Mode has been entered, the MODE button is used
to view and toggle through diagnostic code information. The code displayed is
active if the MODE INDICATOR LED is illuminated.

NOTE: Visually observe the digital display whenever the lever is

moved. N should appear in the digital display if N is selected.

Digital Display. Allison 4th Generation Controls contain two digital displays,
SELECT and MONITOR. During normal operation, if D (Drive) is selected, the
SELECT digital display shows the highest forward range attainable for the shift
schedule in use. The MONITOR digital display shows the lowest available
forward range.
Limited operation is indicated by the digital display as follows:
• All digital display segments are illuminated during initialization. If after
10 seconds communication is not established with the TCM, both digital
displays show \/\ (cateyes).
• When both digital displays show \/\ (cateyes), a selector-related fault code
has been logged.
• When the SELECT display shows R or D has been requested and the
display is flashing the selected range, then the selected range has not been
attained due to an inhibit function. Refer to RANGE SHIFTS AND
INHIBITS in the DRIVING TIPS section.
• Inhibited range, shown by a flashing SELECT digital display, is not an
indication that there is a transmission condition or problem, nor does it
indicate that a DTC has set. An inhibit means there is a vehicle or engine
condition that won’t allow range selection or direction change such as:

29
 — Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

Conditions which illuminate the CHECK TRANS light disable the shift selector.
The SELECT display is blank and the MONITOR display shows the range
actually attained. For a detailed explanation, refer to the CHECK TRANS LIGHT
paragraph in the DRIVING TIPS section.
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.
Display Mode/Diagnostic Button. The DISPLAY MODE/DIAGNOSTIC button
allows access to fluid level information and diagnostic code information.
• Move the shift lever to N and apply the parking brakes.
• Press the DISPLAY MODE/DIAGNOSTIC (DMD) button once to access
oil level information (if an OLS is installed).
• Press the DMD again to access the diagnostic code information.
• Press the MODE button to view subsequent code positions d2 through d5.
• To exit the diagnostic code mode, move the shift lever to another position.

PUSHBUTTON SHIFT SELECTOR.

General Description. The pushbutton shift selector (refer to Figure 9) has the
following components:
• R (Reverse)—Press this button to select Reverse
• N (Neutral)—Press this button to select Neutral
• D (Drive)—Press this button to select Drive. The highest forward range
available will appear in the digital display window. The transmission will
start out in the lowest available forward range and advance automatically to
the highest range.
• ↑ (Up) Arrow—Press the ↑ (Up) Arrow when in D (Drive) to request the
next higher range. Continually pressing the ↑ (Up) Arrow will request the
highest range available.
• ↓ (Down) Arrow—Press the ↓ (Down) Arrow when in D (Drive) to
request the next lower range. Continually pressing the ↓ (Down) Arrow
will request the lowest range available.

30
 • MODE Button—The MODE button can allow the driver to enable a
secondary shift schedule, PTO enable, or other special functions that have
been programmed into the TCM at the request of the OEM. For example, a
vehicle OEM may have provided a secondary shift schedule for improved
fuel economy. The name of the special function (ECONOMY) appears on
the MODE ID label adjacent to the MODE button. Pressing the MODE
button activates the ECONOMY shift schedule and illuminates the MODE
INDICATOR LED. When the Diagnostic Display Mode has been entered,
the MODE button is used to view and toggle through diagnostic code
information. The code displayed is active if the MODE INDICATOR LED
is illuminated.
Digital Display. Allison 4th Generation Controls contain two digital displays,
SELECT and MONITOR. During normal operation, if D (Drive) is selected, the
SELECT display shows the highest forward range attainable for the shift schedule
in use. The MONITOR display shows the lowest available forward range.
Limited operation is indicated by the digital display as follows:
• All digital display segments are illuminated during initialization. If after
10 seconds communication is not established with the TCM, both digital
displays show \/\ (cateyes).
• When both digital displays show \/\ (cateyes), a selector-related fault code
has been logged.
• When the SELECT display shows R or D has been requested and the
display is flashing the selected range, then the selected range has not been
attained due to an inhibit function. Refer to RANGE SHIFTS AND
INHIBITS in the DRIVING TIPS section.
• Inhibited range, shown by a flashing SELECT digital display, is not an
indication that there is a transmission condition or problem, nor does it
indicate that a DTC has set. An inhibit means there is a vehicle or engine
condition that won’t allow range selection or direction change such as:
— Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

Conditions which illuminate the CHECK TRANS light disable the shift selector.
The SELECT display is blank and the MONITOR display shows the range
actually attained. For a detailed explanation, refer to the CHECK TRANS LIGHT
paragraph in the DRIVING TIPS section.

31
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.

NOTE: The oil level sensor (OLS) is standard on 3000 and 4000
Product Families transmissions (optional on the 4700 RDS). Fluid level
information is displayed by simultaneously pressing the ↑ (Up) Arrow
and ↓ (Down) Arrow buttons. Simultaneously press both buttons again
to obtain diagnostic code information.

To display stored codes, do the following:

• Select N and apply the parking brakes.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons once
to access oil level information (if an OLS is installed).
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access diagnostic codes.
• Press the MODE button to display the next code. Repeat for code positions
d3 through d5.
• Press N (Neutral) to exit the diagnostic code mode.
Refer to the CARE AND MAINTENANCE section, FLUID LEVEL CHECK
USING PUSHBUTTON OR LEVER SHIFT SELECTOR, for more information
about fluid level data. Refer to the DRIVING TIPS section, DIAGNOSTIC
CODES DISPLAY PROCEDURE, for more information about diagnostic codes
and display procedure.

32
DESCRIPTION OF AVAILABLE ALLISON 4TH GENERATION
MY09 PROGNOSTICS SHIFT SELECTOR TYPES
NOTE: This section is for Allison 4th Generation Model Year 2009
(MY09) Prognostics ENABLED. Refer to the previous section for
MY09 Prognostics DISABLED and seven-speed transmissions which
don’t have Prognostics.

LEVER SHIFT SELECTOR.

General Description. The Allison lever shift selector (refer to Figure 10) is an
electromechanical control. Typical lever positions are:
• R (Reverse)
• N (Neutral)
• D (Drive)
• Some number of lower forward range positions
Allison transmissions can be programmed to have up to six (seven for 4700 RDS)
forward ranges. Shift selector positions should agree with the programming of the
TCM.
The lever shift selector includes the following:
• HOLD OVERRIDE button
• MODE button
• DISPLAY MODE/DIAGNOSTIC button
• SELECT and MONITOR digital displays and service icon
Hold Override Button. The lever shift selector has three locked positions to
prevent accidentally selecting R (Reverse), N (Neutral), or D (Drive). Select
R (Reverse), N (Neutral), or D (Drive) by pressing the HOLD OVERRIDE
button and moving the lever to the desired position. Once D (Drive) is selected,
lower forward range positions may be selected without pressing the
HOLD OVERRIDE button.
MODE Button. The MODE button can allow the driver to enable a secondary
shift schedule, PTO enable, or other special functions that have been programmed
into the TCM unit at the request of the OEM. For example, a vehicle OEM may
have provided a secondary shift schedule for improved fuel economy. The name
of the special function (ECONOMY) appears on the MODE ID label adjacent to
the MODE button. Pressing the MODE button activates the ECONOMY shift
schedule and illuminates the MODE INDICATOR LED.
When the Diagnostic Display Mode has been entered, the MODE button is used
to view and toggle through diagnostic code information. The code displayed is
active if the MODE INDICATOR LED is illuminated.

33
 HOLD OVERRIDE HOLD OVERRIDE
BUTTON BUTTON

MODE
MODE ID INDICATOR
MODE (LED)
INDICATOR R MODE BUTTON
1 (LED) N
2
D
MODE ID
3 MODE BUTTON
6
4
5 DIGITAL
5
D
DIGITAL DISPLAY * 4 DISPLAY *
3
N
2
R DISPLAY MODE 1
DISPLAY MODE
DIAGNOSTIC DIAGNOSTIC
BUTTON BUTTON

SIX-SPEED, SEVEN-SPEED, CONTOURED

LEFT-HAND RIGHT-HAND BEZEL
LEVER SELECTOR LEVER SELECTOR

DIGITAL DISPLAY*
MODE ID
MODE
R MODE MODE
INDICATOR (LED)
R MODE
MODE BUTTON
N
N Push simultaneously
D to enter diagnostic
D mode and fluid
level check

PUSHBUTTON SELECTORS

*NOTE: The first number displayed in the digital display is the highest forward range available and second
number is range attained in selected position.

Visually confirm that the range selected was attained. If display is flashing, shift is inhibited.

SERVICE ICON
SERVICE ICON

Location of service icon on vertical and horizontal digital display V11058.00.00

Figure 10. Typical Allison 4th Generation MY09 Prognostics Shift

Selectors

34
 NOTE: Visually observe the digital display whenever the lever is
moved. N should appear in the digital display if N is selected.

Digital Display. Allison 4th Generation MY09 Prognostics shift selectors contain
two digital displays (SELECT and MONITOR) and a service icon (open-end
wrench) located between the two displays. During normal operation, if D (Drive)
is selected, the SELECT display shows the highest forward range attainable for
the shift schedule in use. The MONITOR display shows the lowest available
forward range.
Limited operation is indicated by the digital display as follows:
• All digital display segments are illuminated during initialization. If after
10 seconds communication is not established with the TCM, both digital
displays show \/\ (cateyes).
• When both digital displays show \/\ (cateyes), a selector-related fault code
has been logged.
• If the service icon is flashing or fully illuminated, a Prognostics function is
indicated. Refer to PROGNOSTICS FUNCTIONALITY FOR MY09 in the
CARE AND MAINTENANCE section of this manual to determine which
function is indicated.
• When the SELECT display shows R or D has been requested and the
display is flashing the selected range, then the selected range has not been
achieved due to an inhibit function. Refer to RANGE SHIFTS AND
INHIBITS in the DRIVING TIPS section.
• An inhibited range, shown by a flashing SELECT digital display, is not an
indication that there is a transmission condition or problem, nor does it
indicate that a DTC has set. An inhibit means there is a vehicle or engine
condition that won’t allow range selection attainment or direction change
such as:
— Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

35
Conditions which illuminate the CHECK TRANS light disable the shift selector.
The SELECT display is blank and the MONITOR display shows the range
actually attained. For a detailed explanation, refer to the CHECK TRANS LIGHT
paragraph in the DRIVING TIPS section.
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.
Display Mode/Diagnostic Button. The DISPLAY MODE/DIAGNOSTIC button
allows access to fluid level information, Prognostics information, and diagnostic
code information.
• Move the shift lever to N and apply the parking brake.
• Press the DISPLAY MODE/DIAGNOSTIC (DMD) button once to access
oil level information.
• Press the DMD again to access the Oil Life Monitor.
• Press the DMD again to access the Filter Life Monitor.
• Press the DMD again to access the Transmission Health Monitor.
• Press the DMD again to access the diagnostic code information.
• Press the MODE button to view subsequent code positions d2 through d5.
• To exit the diagnostic code mode, move the shift lever to another position.
PUSHBUTTON SHIFT SELECTOR.
General Description. The pushbutton shift selector (refer to Figure 10) has the
following components:
• R (Reverse)—Press this button to select Reverse
• N (Neutral)—Press this button to select Neutral
• D (Drive)—Press this button to select Drive. The highest forward range
available will appear in the displayed in the SELECT digital display and the
MONITOR digital display will show the lowest available forward range.
The transmission will start out in the lowest available forward range and
advance automatically to the highest range.
• ↑ (Up) Arrow—Press the ↑ (Up) Arrow when in D (Drive) to request the
next higher range. Continually pressing the ↑ (Up) Arrow will request the
highest range available.
• ↓ (Down) Arrow—Press the ↓ (Down) Arrow when in D (Drive) to
request the next lower range. Continually pressing the ↓ (Down) Arrow
will request the lowest range available.
• MODE Button—The MODE button can allow the driver to enable a
secondary shift schedule, PTO enable, or other special functions that have
been programmed into the TCM at the request of the OEM. For example, a
vehicle OEM may have provided a secondary shift schedule for improved
fuel economy. The name of the special function (ECONOMY) appears on
the MODE ID label adjacent to the MODE button. Pressing the MODE
button activates the ECONOMY shift schedule and illuminates the MODE
INDICATOR LED. When the Diagnostic Display Mode has been entered,

36
 the MODE button is used to view and toggle through diagnostic code
information. The code displayed is active if the MODE INDICATOR LED
is illuminated.
• SELECT and MONITOR digital display and service icon
Digital Display. Allison 4th Generation MY09 Prognostics contain two digital
displays (SELECT and MONITOR) and a service icon (open-end wrench) located
between the two displays. During normal operation, if D (Drive) is selected, the
SELECT display shows the highest forward range attainable for the shift schedule
in use. The MONITOR display shows the lowest available forward range.
Limited operation is indicated by the digital displays as follows:
• All display segments are illuminated during initialization. If after
10 seconds communication is not established with the TCM, both displays
show \/\ (cateyes).
• When both displays show a \/\ (cateye), a selector-related fault code has
been logged.
• If the service icon is flashing or fully illuminated, a Prognostics function is
indicated. Refer to PROGNOSTICS FUNCTIONALITY FOR MY09 in the
CARE AND MAINTENANCE section of this manual to determine which
function is indicated.
• When the SELECT display shows R or D has been requested and the
display is flashing the selected range, then the selected range has not been
attained due to an inhibit function. Refer to RANGE SHIFTS AND
INHIBITS in the DRIVING TIPS section.
• Inhibited range, shown by a flashing SELECT digital display, is not an
indication that there is a transmission condition or problem, nor does it
indicate that a DTC has set. An inhibit means there is a vehicle or engine
condition that won’t allow range selection or direction change such as:
— Too high idle speed in N to allow R or D
— Too high a throttle signal in N to allow R or D
— Too high of an output speed in N to allow R or D
— An active vehicle function or I/O function is operating which inhibits
range.

CAUTION: The transmission will not shift into range from N if a

CHECK TRANS code is active. If a CHECK TRANS code is active,
move vehicle to a safe location before turning off the engine.

Conditions which illuminate the CHECK TRANS light disable the shift selector.
The SELECT display is blank and the MONITOR display shows the range
actually attained. For a detailed explanation, refer to the CHECK TRANS LIGHT
paragraph in the DRIVING TIPS section.

37
Once D (Drive) is attained, the transmission will shift into the lowest forward
range programmed for the D (Drive) position, usually first-range.
To display stored codes, do the following:
• Select N and apply the parking brakes.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons once
to access oil level information (if an OLS is installed).
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access the Oil Life Monitor.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access the Filter Life Monitor.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access the Transmission Health Monitor.
• Simultaneously press the ↑ (Up) Arrow and ↓ (Down) Arrow buttons
again to access the diagnostic codes.
• Press the MODE button to display the next code. Repeat for code positions
d3 through d5.
• Press N (Neutral) to exit the diagnostic code mode.
Refer to the CARE AND MAINTENANCE section, FLUID LEVEL CHECK
USING PUSHBUTTON OR LEVER SHIFT SELECTOR, for more information
about fluid level data. Refer to the DRIVING TIPS section, DIAGNOSTIC
CODES DISPLAY PROCEDURE, for more information about diagnostic codes
and display procedure.

38
RANGE SELECTION
PUSHBUTTON AND LEVER SHIFT SELECTORS
WITH DIGITAL DISPLAY

Description of Available Ranges (refer to Figure 1 through Figure 3)

WARNING: If you leave the vehicle and the engine is
running, the vehicle can move unexpectedly and you or
others could be injured. If you must leave the engine
running, do not leave the vehicle until you have
completed all of the following procedures:
1. Put the transmission in N (Neutral).
2. Be sure the engine is at low idle (500–800 rpm).
3. Apply the parking brakes and emergency brake and
make sure they are properly engaged.
4. Chock the wheels and take any other steps
necessary to keep the vehicle from moving.

R
E
V WARNING: R (Reverse) may not be attained due to
E an active inhibitor. Always apply the service brakes
R when selecting R (Reverse) to prevent unexpected
S vehicle movement and because a service brake inhibit
E may be present. When “R” is flashing, it indicates the
shift to R (Reverse) is inhibited. Determine if
diagnostic codes are active if R (Reverse) is not
attained. Refer to DOWNSHIFT AND DIRECTION
CHANGE INHIBITOR FEATURE in the DRIVING
TIPS section.

CAUTION: Do not idle in R (Reverse) for more than

five minutes. Extended idling in R (Reverse) can cause
transmission overheating and damage. Always select
N (Neutral) whenever time at idle exceeds five minutes.

39
 PUSHBUTTON AND LEVER SHIFT SELECTORS
WITH DIGITAL DISPLAY (cont’d)
Description of Available Ranges (refer to Figure 1 through Figure 3)
NOTE: Visually observe the digital display window
whenever a button is pushed or the lever is moved to be
R sure the range selected is shown (i.e., if the N (Neutral)
E button is pressed, “N” should appear in the digital display).
V A flashing display indicates the range selected was not
E attained due to an active inhibit.
R R Completely stop the vehicle and let the engine return to idle
S before shifting from a forward range to R (Reverse) or
E from R (Reverse) to a forward range. The digital display
will display “R” when R (Reverse) is selected.

WARNING: When starting the engine, make sure the

service brakes are applied. Failure to apply the service
brakes can result in unexpected vehicle movement.

WARNING: Vehicle service brakes, parking brake, or

N emergency brake must be applied whenever N (Neutral)
E is selected to prevent unexpected vehicle movement.
U Selecting N (Neutral) does not apply vehicle brakes,
T unless an auxiliary system to apply the parking brake is
R installed (refer to the Operator’s Manual for the vehicle).
A
L
WARNING: If you let the vehicle coast in N (Neutral),
there is no engine braking and you could lose control.
Coasting can also cause severe transmission damage. To
help avoid injury and property damage, do not allow the
vehicle to coast in N (Neutral).

40
 PUSHBUTTON AND LEVER SHIFT SELECTORS
WITH DIGITAL DISPLAY (cont’d)
Description of Available Ranges (refer to Figure 1 through Figure 3)
N Use N (Neutral) when starting the engine, to check vehicle
accessories, and for extended periods of engine idle
operation (longer than five minutes). For vehicles equipped
N with the pushbutton selector, N (Neutral) is selected by the
E TCM/ECU during start-up. For vehicles equipped with the
U lever selector, the vehicle will not start unless N (Neutral)
T has been selected. If the vehicle starts in any range other
R than N (Neutral), seek service immediately. N (Neutral) is
A also used during stationary operation of the power takeoff
L (if the vehicle is equipped with a PTO). The digital display
will show “N” when N (Neutral) is selected. Always select
N (Neutral) before turning off the vehicle engine.

WARNING: D (Drive) may not be attained due to an

active inhibitor. Always apply the service brakes when
selecting D (Drive) to prevent unexpected vehicle
movement and because a service inhibit may be
present. When “D” is flashing, it indicates the shift to
D (Drive) is inhibited. Determine if diagnostic codes
are active if D (Drive) is not attained. Refer to
DOWNSHIFT AND DIRECTION CHANGE
INHIBITOR FEATURE in the DRIVING TIPS
section.
D
R
I CAUTION: Do not idle in D (Drive) for more than five
V minutes. Extended idling in D (Drive) may cause
E transmission overheating and damage. Always select
N (Neutral) if time at idle exceeds five minutes.

NOTE: Turn off the vehicle HIGH IDLE switch, if present,

before shifting from N (Neutral) to D (Drive) or
R (Reverse). D (Drive) or R (Reverse) will not be attained
unless the shift is made with the engine at idle. Also, be
aware of other interlocks that would prevent attaining
D (Drive) or R (Reverse). Example: “service brakes not
applied” (service brake interlock present).

41
 PUSHBUTTON AND LEVER SHIFT SELECTORS
WITH DIGITAL DISPLAY (cont’d)
Description of Available Ranges (refer to Figure 1 through Figure 3)
The transmission will initially attain first range when
D (Drive) is selected (except for those units programmed to
D
start in second-range). As vehicle speed increases, the
R
transmission will upshift automatically through each range.
I D
As the vehicle or equipment slows down, the transmission
V
will automatically downshift to the correct range. The
E
digital display will show the highest range available in
D (Drive).

42
 PUSHBUTTON AND LEVER SHIFT SELECTORS
WITH DIGITAL DISPLAY (cont’d)
Description of Available Ranges (refer to Figure 1 through Figure 3)
WARNING: The transmission incorporates a hold
feature to prohibit upshifting above the range selected
during normal driving. For downhill operation, select a
lower transmission range. If the engine governed speed
is exceeded in the held range, however, the transmission
will upshift to the next higher range to prevent engine
damage. To avoid injury and/or property damage due to
loss of vehicle control, use the vehicle brakes to prevent
exceeding engine governed speed in the held range.

M 7+ Lower ranges provide greater engine braking for going

A 6* down grades (the lower the range, the greater the braking
N 5* effect). Occasionally, it may be desirable to restrict
U 4*
3 automatic shifting to a lower range because of:
A 2 • Road conditions.
L
• Load.
S • Traffic conditions.
E • Etc.
L The pushbutton shift selector arrow buttons access
E individual forward ranges. Push the ↑ (Up) or ↓ (Down)
C arrow for the desired range. The digital display shows the
range chosen. Even though a lower range is selected, the
T
transmission may not downshift until vehicle speed is
reduced (this prevents excessive engine speed in the lower
range).
1 First-range provides the vehicle with its maximum driving
torque and engine braking effect. Use first-range when:
• Pulling through mud and deep snow.
• Maneuvering in tight spaces.
• Driving up or down steep grades.
For vehicles equipped with the pushbutton selector, push
the ↓ (Down) arrow until first-range appears in the select
window.
+ Only available in 4000 Product Family 7-speed transmissions.
* Actual ranges available depend on programming by vehicle manufacturer.

43
 DRIVING TIPS

CHECK TRANS LIGHT

The electronic control system is programmed to inform the operator of a problem
with the transmission system and automatically take action to protect the operator,
vehicle, and transmission. When the Electronic Control Unit (ECU) or the
Transmission Control Module (TCM) logs a DTC, the TCM/ECU:
• Restricts shifting.
• Illuminates the CHECK TRANS light on the instrument panel.
• Registers a diagnostic code.

NOTE: Some diagnostic codes may be logged without the TCM/ECU

activating the CHECK TRANS light. Your Allison Transmission
authorized service outlet should be consulted whenever there is a
transmission-related concern. They have the equipment to access and
troubleshoot diagnostic codes.

The CHECK TRANS light will illuminate each time the engine is started, then
turn off after a few seconds. This momentary lighting is to show that the status
light circuits are working properly. If the CHECK TRANS light does not
illuminate during ignition, or if the light remains on after ignition, have the
transmission inspected at the earliest opportunity by an Allison Transmission
authorized service outlet.
Continued illumination of the CHECK TRANS light during vehicle operation
(other than start-up) indicates that the TCM/ECU has signaled a diagnostic code.
The single digit shift selector display will show the actual range attained and the
transmission will not respond to shift selector requests. The dual digit shift
selector will blank the range selected and show the range attained with a CHECK
TRANS light.
Indications from the shift selector are provided to inform the operator the
transmission is not performing as designed and is operating with reduced

44
capabilities. Before turning off the ignition, the transmission may be operated for a
short time in the attained range in order to get the vehicle to a safe location for
service assistance. Service should be performed immediately in order to minimize
the potential for damage to the transmission.
When the CHECK TRANS light is illuminated and the ignition switch is turned
off, the transmission will remain in N (Neutral) until the condition causing the
CHECK TRANS light is corrected.
Generally, while the CHECK TRANS light is on, upshifts and downshifts will be
restricted and direction changes will not occur. Lever and pushbutton shift
selectors do not respond to any operator shift requests while the CHECK
TRANS light is illuminated. The lockup clutch is disengaged when transmission
shifting is restricted.

DIAGNOSTIC CODES OVERVIEW

Diagnostic codes are numerical indications relating to a malfunction in
transmission or vehicle operation. These codes are logged in the TCM/ECU
memory with the most severe or most recent code listed first. A maximum of five
codes (numbered d1–d5) may be listed in memory at one time. As codes are
added, the oldest non-active code is dropped from the list. If all codes are active,
the code with the lowest priority that is not included on the severity list is
dropped from the list.
Diagnostic codes and code information may be accessed through the pushbutton
and lever shift selectors or the Allison DOC™ For PC–Service Tool.
The TCM/ECU separately stores the active and historical (non-active) codes. An
active code is any code that is current in the TCM/ECU decision-making process.
Historical codes (not active) are codes that are retained in the TCM/ECU memory
and will not necessarily affect the TCM/ECU decision-making process. Historical
codes are useful in determining if a DTC:
• Is isolated.
• Is intermittent.
• Results from a previous malfunction.
The TCM/ECU may automatically delete a code from memory if it has not
recurred for a period of time.
If the MODE INDICATOR (LED) is illuminated, the displayed code is active. If
the MODE INDICATOR (refer to Figure 8 through Figure 10) is not illuminated,
the displayed code is not active. An illuminated MODE INDICATOR during
normal operation signifies secondary mode operation.

45
WTEC III DIAGNOSTIC CODE DISPLAY PROCEDURE
Diagnostic codes can be read and cleared by either of the following methods:
• Allison DOC™ For PC–Service Tool. For specific instructions on how to
use the Allison DOC™ For PC–Service Tool, refer to Allison Transmission
publication GN3433EN, User Guide.
• Pushbutton or lever shift selectors.

Pushbutton Shift Selector. To begin the Diagnostic Process:

1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes (refer to Figure 8):
1. If an OLS is present, simultaneously press the ↑ (Up) and ↓ (Down)
arrow buttons twice to display the first code.
2. Visually observe the digital display for codes which are displayed as
follow:
Example–Code 1312:
Displays as d, 1, 1, 3, 1, 2 (each item appears for about one second)
— d, 1–indicates that this is the first diagnostic code listed in the
ECU memory
— 1, 3–main code (2 digits displayed one-at-a-time) are listed first
and provide the general condition or area of a fault detected by the
ECU
— 1, 2–subcodes (2 digits displayed one-at-a-time) are listed second
and provide specific areas or conditions within the main code that
caused the fault. This code indicates the problem is caused by low
voltage
3. Press the MODE button to view the next code; repeat for subsequent
codes.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
• To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR LED flashes. Release the MODE button and active indicators
will not be illuminated.
• To clear inactive codes, press and hold the MODE button for 10 seconds.
Some codes are self-clearing and others require ignition cycles to clear.

46
 NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

Lever Shift Selector. To Begin the Diagnostic Process:

1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes (refer to Figure 8):
1. If an OLS is present, press the DISPLAY MODE/DIAGNOSTIC (DMD)
button twice to display the first code.
2. Observe the digital display for codes. Diagnostic codes will appear one
digit at a time (refer to explanation under Pushbutton Shift Selector above).
3. Press the MODE button to view the next code; repeat for subsequent code.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
1. To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR (LED) flashes. Release the MODE button and active
indicators will not be illuminated.
2. To clear inactive codes, press and hold the MODE button for 10 seconds.
Some codes are self-clearing and others require ignition cycles to clear.

NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

47
ALLISON 4TH GENERATION CONTROLS DIAGNOSTIC
CODE DISPLAY PROCEDURE
NOTE: Use this section for Allison 4th Generation Controls, MY09
Prognostics DISABLED, and seven-speed transmissions which don’t
have MY09 Prognostics.

Diagnostic codes can be read and cleared by either of the following methods:
• Allison DOC™ For PC–Service Tool. For specific instructions on how to
use the Allison DOC™ For PC–Service Tool, refer to Allison Transmission
publication GN3433EN, User Guide.
• Pushbutton or lever shift selectors.
Pushbutton Shift Selector. To begin the Diagnostic Process:
1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes (refer to Figure 9):
1. If an OLS is present, simultaneously press the ↑ (Up) and ↓ (Down)
arrow buttons twice to display the first code.
2. When the diagnostic code mode is entered, the first code (d1) is displayed
as follows:
Example–code P0722
Displays as d 1, P, 0 7, 2 2 (each item appears for about one second)
Allison 4th Generation shift selectors have two digital displays, SELECT
and MONITOR. Each item is displayed for about one second. The display
cycles continuously until the next code list position is accessed by
pressing the MODE button. There is a 2 minute timer that will timeout if
no buttons are pressed causing N N to display instead of the diagnostic
code.
The following example shows how the DTC P0722 is displayed on the
pushbutton shift selector.

DIGITAL DISPLAY
SELECT MONITOR
d 1
P
0 7
2 2

• d 1 (code list position); the position which a code occupies in the

code list. Positions are displayed as “d1” through “d5”.

48
 • P0722 (DTC); the diagnostic trouble code number referring to the
general condition or area of fault detected by the TCM.
3. Press the MODE button to view the next code; repeat for subsequent
codes.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
• To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR LED flashes. Release the MODE button and active indicators
will not be illuminated.
• To clear inactive codes, press and hold the MODE button for 10 seconds.
Some codes are self-clearing and others require ignition cycles to clear.

NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

Lever Shift Selector. To Begin the Diagnostic Process:

1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes (refer to Figure 9):
1. If an OLS is present, press the DISPLAY MODE/DIAGNOSTIC (DMD)
button twice to display the first code.
2. Refer to the Pushbutton Shift Selector for an explanation of code displays.
3. Press the MODE button to view the next code; repeat for subsequent
codes.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

49
To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
1. To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR (LED) flashes. Release the MODE button and active
indicators will not be illuminated.
2. To clear inactive codes, press and hold the MODE button for 10 seconds.
3. Depending on the code(s), active indicators can be cleared:
— On successful power down
— Manually
— Self clearing.

NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

ALLISON 4TH GENERATION MY09 PROGNOSTICS

DIAGNOSTIC CODE DISPLAY PROCEDURE
NOTE: Use this section for Allison 4th Generation MY09 Prognostics
ENABLED. Refer to the previous section for Allison 4th Generation
MY09 Prognostics DISABLED, and seven-speed transmissions which
don’t have MY09 Prognostics.

Diagnostic codes can be read and cleared by either of the following methods:
• Allison DOC™ For PC–Service Tool. For specific instructions on how to
use the Allison DOC™ For PC–Service Tool, refer to Allison Transmission
publication GN3433EN, User Guide.
• Pushbutton or lever shift selectors.

Pushbutton Shift Selector. To begin the Diagnostic Process:

1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes (refer to Figure 10):
1. Simultaneously press the ↑ (Up) and ↓ (Down) arrow buttons to display
oil level information.
2. Simultaneously press the ↑ (Up) and ↓ (Down) arrow buttons again to
display Oil Life Monitor.

50
 3. Simultaneously press the ↑ (Up) and ↓ (Down) arrow buttons again to
display Filter Life Monitor.
4. Simultaneously press the ↑ (Up) and ↓ (Down) arrow buttons again to
display Transmission Health Monitor.
5. Simultaneously press the ↑ (Up) and ↓ (Down) arrow buttons again to
display diagnostic code mode.
6. When the diagnostic code mode is entered, the first code (d1) is displayed
as follows:
Example–code P0722
Displays as d 1, P, 0 7, 2 2 (each item appears for about one second)
The Allison 4th Generation shift selectors have two digital displays,
SELECT and MONITOR. Each item is displayed for about one second.
The display cycles continuously until the next code list position is
accessed by pressing the MODE button. The following example shows
how the DTC P0722 is displayed on the pushbutton shift selector.

DIGITAL DISPLAY
SELECT MONITOR
d 1
P
0 7
2 2

• d 1 (code list position); the position which a code occupies in the

code list. Positions are displayed as “d1” through “d5”.
• P0722 (DTC); the diagnostic trouble code number referring to the
general condition or area of fault detected by the TCM.
7. Press the MODE button to view the next code; repeat for subsequent
codes.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
• To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR LED flashes. Release the MODE button and active indicators
will not be illuminated.
• To clear inactive codes, press and hold the MODE button for 10 seconds.
Some codes are self-clearing and others require ignition cycles to clear.

51
 NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

Lever Shift Selector. To Begin the Diagnostic Process:

1. Bring the vehicle to a stop at a safe location.
2. Shift to N (Neutral).
3. Apply the parking brake.
To Display Stored Codes:
1. Press the DISPLAY MODE/DIAGNOSTIC (DMD) button once to
display the oil level information.
2. Press the DMD button again to display the Oil Life Monitor.
3. Press the DMD button again to display the Filter Life Monitor.
4. Press the DMD button again to display the Transmission Health Monitor.
5. Press the DMD button again to access the diagnostic code mode.
6. Press the MODE button to view the next code; repeat for subsequent
codes.

NOTE: Be sure to record all codes displayed before they are cleared.
This is essential for troubleshooting.

To Clear Active Indicators and Inactive Codes then Resume Vehicle Operation:
1. To clear active indicators such as the CHECK TRANS light, press and
hold the MODE button for approximately three seconds until the MODE
INDICATOR (LED) flashes. Release the MODE button and active
indicators will not be illuminated.
2. To clear inactive codes, press and hold the MODE button for 10 seconds.
Some codes are self-clearing and others require ignition cycles to clear.

NOTE: If the condition that caused the code is still present, the code
will again become active.

Begin operating as normal. Have the transmission inspected at the earliest

opportunity by an Allison Transmission distributor or dealer.

52
ACCELERATOR CONTROL
WARNING: To help avoid unexpected vehicle movement that might
cause death, serious injury, or property damage, always have your foot
on the brake, the throttle released, and the engine at idle before making
a N (Neutral) to D (Drive); N (Neutral) to R (Reverse); D (Drive) to
R (Reverse); or R (Reverse) to D (Drive) selection.

The position of the accelerator pedal influences when automatic shifting occurs.
An electronic throttle position signal tells the TCM/ECU how much the operator
has depressed the pedal. When the pedal is fully depressed, upshifts will occur
automatically at higher engine speeds. A partially depressed position of the pedal
will cause upshifts to occur at lower engine speeds. Excessive throttle position
affects directional changes—shifts from N (Neutral) to D (Drive) or R (Reverse).

RANGE SHIFTS AND INHIBITS

NOTE: Turn off the vehicle HIGH IDLE switch, if present, before
shifting from N (Neutral) to D (Drive) or R (Reverse). The shift from
N (Neutral) to D (Drive) or R (Reverse) is inhibited when engine speed
is above idle.

Range Shifts. There is no speed limitation on upshifting, but there is a limitation

on downshifting and for shifts that cause a direction change such as
D (Drive)-to-R (Reverse) or R (Reverse)-to-D (Drive).
Manual range downshifts will not occur until a calibration output speed (preset) is
reached. When a range downshift is manually selected and the transmission output
speed is above the calibration speed, the transmission will stay in the range it was
in even though a lower range was requested. Apply the vehicle service brakes or a
retarding device to reduce the transmission output speed to the calibration speed
and then the shift to the lower range will occur.

Inhibits. Directional shifts, D (Drive)-to-R (Reverse), R (Reverse)-to-D (Drive)

and N (Neutral)-to-range, will not occur if selected when throttle position, engine
speed, or transmission output speed is above the calibration limit for a calibration
time period. The current calibration time period for engine speed is 0.5 seconds
and for throttle position and output speed is three seconds. Range inhibits latch
after the time period and the driver will have to re-select the desired range.
Shifts from N (Neutral)-to-D (Drive) or N (Neutral)-to-R (Reverse) are also
inhibited when the TCM/ECU has been programmed (by input/output function) to
detect that auxiliary equipment is in operation and the shift should not be allowed.

53
When directional change shifts and N (Neutral)-to-range shifts are inhibited, the
TCM/ECU will put the transmission in N (Neutral) and the digital display will
flash an R for Reverse inhibit or the range selected digit for a D for Drive inhibit.
When range inhibits latch because the timer expires, the driver must re-select a
range.
For a pushbutton selector, press the desired pushbutton again.
For a lever selector, move the lever to N (Neutral) and then to the desired range.
When a direction change shift is requested and engine throttle, engine speed, and
transmission output speed drop below the calibration value during the calibration
time interval, the shift to D (Drive) or R (Reverse) will occur.

USING THE ENGINE TO SLOW THE VEHICLE

WARNING: To help avoid loss of control, use a combination of
downshifting, braking, and other retarding devices. Downshifting to a
lower transmission range increases engine braking and can help you
maintain control. The transmission has a feature to prevent automatic
upshifting above the lower range selected. However, during downhill
operation, if engine governed speed is exceeded in the lower range, the
transmission will upshift to the next higher range to prevent engine
damage. This will reduce engine braking and could cause a loss of
control. Apply the vehicle brakes or other retarding device to prevent
exceeding engine governed speed in the lower range selected.

Engine braking provides good speed control for going down grades. When the
vehicle is heavily loaded, or the grade is steep, it may be desirable to preselect a
lower range before reaching the grade. If engine-governed speed is exceeded, the
transmission will upshift automatically to the next range.
To use engine braking, select the next lower range. If the vehicle is exceeding the
maximum speed for this range, use the service brakes and/or retarder to slow the
vehicle. When a lower speed is reached, the TCM/ECU will automatically
downshift the transmission.

54
USING THE HYDRAULIC RETARDER
WARNING: DO NOT USE THE RETARDER DURING INCLEMENT
WEATHER OR WHEN ROAD SURFACES ARE SLIPPERY.
Use of the hydraulic retarder during inclement weather or when road
surfaces are slippery could result in death, serious injury, or property
damage. On vehicles which have a primary retarder control based upon
closed throttle position, brake pedal position, or brake apply pressure,
always manually disable the retarder controls during inclement weather
or slippery road conditions, using the OEM provided retarder enable
switch if present.
If the transmission retarder does not apply, death, serious injury, or
property damage may occur. Operator should be prepared to apply
vehicle brakes or other retarder device if the transmission retarder does
not apply.
If the transmission retarder does not function, death, serious injury, or
property damage may occur. Be sure to test for proper retarder function
periodically. If a retarder is present but is not detected by “autodetect”,
the retarder will not function. Whenever the retarder does not apply,
seek service help immediately.

Regardless of the type of Allison retarder controls on your vehicle, the following
safety features are common to each configuration:
• The retarder can be disabled when inclement weather or slippery road
conditions are present.
• Vehicle brake lights should always be on when the retarder is applied
(periodically verify that they are working).
• Anti-lock brake systems send a signal to the transmission TCM/ECU to
indicate that the brake system is activated.

NOTE: The retarder is automatically disabled and the lockup clutch is

disengaged whenever the vehicle anti-lock brake system (ABS) is active.
However, in case the ABS system malfunctions, it is recommended that
the retarder enable switch, if present, be disabled.

A hydraulic retarder is available on all of the models covered in this manual. The
retarder is activated and controlled in various ways. The control depends upon the
vehicle type and particular duty cycle. Both manual and automatic controls are
available. Automatic controls are applied by the TCM/ECU. In Allison 4th
Generation Control systems, the TCM may also activate or limit retarder operation
in response to torque speed control or electronic retarder control messages

55
received on the vehicle’s J1939 Data Link. Some types of controls and the amount
of retarder application are shown in the Types of Retarder Control table that
follows.
The presence of a retarder must be “autodetected” as part of Allison 4th
Generation Controls and the WTEC III control system.

NOTE: If your transmission has a retarder but it is not functioning, it

may not have been “autodetected” during vehicle manufacture. Consult
the nearest Allison Transmission service outlet to have “autodetect” reset
or the retarder enabled using the Allison DOC™ For PC–Service Tool.

NOTE: When reduced retarder performance is observed, be sure the

transmission fluid level is within the operating band on the dipstick
(refer to Figure 14). Low fluid level is a common cause for retarder
performance complaints.

NOTE: The retarder requires about two seconds to reach full capacity.
Be sure to anticipate this delay when using the retarder. Anticipation
will prevent unnecessary service brake applications during
non-emergency stops.

56
 Types of Retarder Control

Type Description Amount of Application

Manual Separate apply Zero to Full apply
pedal
Hand lever * Six levels based on lever position
Automatic Auto “Full On” * “Full On” when closed throttle sensed
Brake Pressure Single pressure Off or “Full On” (based on brake
Apply** switch pressure)
1
Three pressure /3, 2/3, or “Full On” (based on brake
switches pressure)
1
Pedal Position ** Special brake /3, 2/3, or “Full On” (based on pedal
pedal position)
J1939 Data Link Digital message Zero to Full Apply
from engine
controller
Combinations of Auto “half-on” Half capacity at closed throttle or
the above plus pressure “Full On” with brake pressure
systems ** switch *
Auto “1/3 on” plus 1
/3, capacity at closed throttle or 2/3
two pressure and “Full On” with brake pressure
switches *
Hand lever plus 6 levels of modulation with lever, or
pressure switch * “Full On” with brake pressure
Foot pedal plus Full modulation with separate pedal,
pressure switch or “Full On” with brake pressure
Hand lever plus 6 levels of modulation with lever, or 3
interface for levels of modulation based on pedal
special pedal * position
* These control systems may apply the retarder at high speed on grades when the vehicle has road
speed limiting and the retarder is enabled.
** For retarder apply systems integrated with the service brake system, the retarder is most
effective when applied with light brake pedal pressure for 1–2 seconds to allow the retarder to
fully charge. Added pedal pressure can be applied when more aggressive braking is desired.

NOTE: When the transmission fluid or engine water temperature

(engine water temperature is an OEM option) exceeds programmed
limits, retarder capacity is automatically gradually reduced to minimize
or avoid possible system overheating.

57
Contact your vehicle manufacturer to understand how the retarder controls have
been integrated into your vehicle.

CAUTION: Observe the following cautions when driving a vehicle

equipped with a retarder:
• THE RETARDER WORKS ONLY WHEN THE ENGINE IS AT
CLOSED THROTTLE.
• OBSERVE TRANSMISSION AND ENGINE TEMPERATURE
LIMITS AT ALL TIMES. Select the lowest possible transmission
range to increase the cooling system capacity and total retardation
available.
• In the event of OVERHEATING, DECREASE THE USE OF THE
RETARDER; USE THE SERVICE BRAKES TO SLOW THE
VEHICLE.
• OBSERVE THE RETARDER/SUMP “OVERTEMP” LIGHT to be
sure it responds properly to retarder temperature.

NOTE: The transmission retarder is configured as either a low, medium,

or high capacity retarder. Retarder capacity configuration is determined
by the vehicle OEM. Allison Transmission requires vehicle OEM
approval before a service outlet increases the retarder capacity at
customer request. This vehicle qualification is to make sure existing
vehicle drivelines, differentials, axles, and cooling system are designed
for the additional retarder torque generated in a higher capacity retarder
configuration. Additionally, WTEC III Controls will require a retarder
charging spring change and possibly an ECU re-calibration as well.
Allison 4th Generation retarder requires only a TCM re-calibration with
the OEM approval for a higher capacity retarder. Cost incurred to
modify retarder capacity is the responsibility of the customer.

NOTE: Allison 4th Generation and WTEC III retarder activation,

response, and driver requested retarder amount are characteristically
similar but not identical. Refer to the Types of Retarder Control Table in
this section to see how retarder modulation request (RMR) can be
changed if desired to increase or decrease retarder percentage apply.
These controls are also OEM determined and installed. Cost incurred to
modify a RMR is the responsibility of the customer.

NOTE: Transmission fluid level must be set correctly for highest

retarder effectiveness. As much as 2 liters (2 quarts) too high or too low
can reduce retarder effectiveness and increase transmission temperature.

58
RANGE PRESELECTION
NOTE: Preselecting during normal operation may result in reduced fuel
economy.

Range preselection means selecting a lower range to match driving conditions

encountered or expect to be encountered. Learning to take advantage of
preselected shifts will give you better control on slick or icy roads and on
downgrades.
Downshifting to a lower range increases engine braking. The selection of a lower
range often prevents cycling between that range and the next higher range on a
series of short up-and-down hills.

COLD WEATHER STARTS

All transmissions are programmed to restrict full operation until specific fluid
temperatures are reached. Refer to the following table for temperature restrictions.

Minimum Fluid Operating Temperatures

CHECK
Sump Fluid Temperature TRANS Light Operation
–32°C (–25°F) to –7°C (19°F) OFF Neutral, Reverse, Second
–7°C (19°F) OFF Full operation in all ranges

NOTE: When sump temperature is below 10°C (50°F) and transmission

fluid is not DEXRON®, TES 389, or TES 295, follow these procedures
when making directional shift changes:
• To shift from forward to reverse, select N (Neutral) and then
R (Reverse).
• To shift from reverse to forward, select N (Neutral) and then
D (Drive) or other forward range.
Failure to follow these procedures may cause illumination of the
CHECK TRANS light and the transmission will be restricted to
N (Neutral).

Transmission operation at cold ambient temperatures may require preheating or

the use of a lower viscosity transmission fluid. Refer to MANUAL FLUID
CHECK PROCEDURE in the CARE AND MAINTENANCE section.

59
DRIVING ON SNOW OR ICE
WARNING: Using the retarder on wet or slippery roads may cause loss
of traction on the drive wheels—your vehicle may slide out of control.
To help avoid injury or property damage, turn the retarder enable to
OFF when driving on wet or slippery roads.

NOTE: The retarder is automatically disabled whenever the vehicle

ABS is active. However, in case the anti-lock brake system (ABS)
malfunctions, it is recommended that the retarder enable switch, if
present, be disabled.

If possible, reduce vehicle speed and select a lower range before losing traction.
Select the range that will not exceed the speed expected to be maintained.
Accelerate or decelerate very gradually to prevent the loss of traction. It is very
important to decelerate gradually when a lower range is selected. It is important
that you reach the selected lower range before attempting to accelerate. This will
avoid an unexpected downshift during acceleration.

ROCKING OUT
WARNING: To help avoid injury or property damage caused by sudden
movement of the vehicle, do not make shifts from N (Neutral) to
D (Drive) or R (Reverse) when the throttle is open. The vehicle may
lurch forward or rearward and the transmission can be damaged. Avoid
this condition by making shifts from N (Neutral) to a forward range or
R (Reverse) only when the throttle is closed and the service brakes are
applied.

CAUTION: DO NOT make N (Neutral) to D (Drive) or directional

shift changes when the engine rpm is above idle. Also, if the wheels are
stuck and not turning, do not apply full power for more than 10 seconds
in either D (Drive) or R (Reverse). Full power for more than 10 seconds
under these conditions will cause the transmission to overheat. If the
transmission overheats, shift to N (Neutral) and operate the engine at
1200–1500 rpm until it cools (2–3 minutes).

If the vehicle is stuck in deep sand, snow, or mud, it may be possible to rock it
out using the following procedure:
1. Shift to D (Drive) and apply steady, light throttle (never full throttle).

60
 2. When the vehicle has rocked forward as far as it will go, apply and hold
the vehicle service brakes.
3. When engine has returned to idle, select R (Reverse).
4. Release the brakes and apply a steady, light throttle allowing the vehicle to
rock in R (Reverse) as far as it will go.
5. Again, apply and hold the service brakes and allow the engine to return to
idle.
This procedure may be repeated in D (Drive) and R (Reverse) if each directional
shift continues to move the vehicle a greater distance. Never make
N (Neutral)-to-D (Drive) or directional shift changes when the engine rpm is
above idle.

HIGH FLUID TEMPERATURE

The transmission is considered to be overheated when any of the following
temperatures are exceeded:

Sump fluid 121°C (250°F)

Fluid to cooler 149°C (300°F)
Retarder out fluid 165°C (330°F)

If the transmission overheats during normal operations, be sure the fluid level is
correct in the transmission. Refer to the fluid level check procedures described in
the CARE AND MAINTENANCE section.

CAUTION: The engine should never be operated for more than

10 seconds at full throttle with the transmission in range and the output
stalled. Prolonged operation of this type will cause the transmission fluid
temperature to become excessively high and will cause severe overheat
damage to the transmission.

If the engine temperature gauge indicates a high temperature, the transmission is

probably overheated. Stop the vehicle and check the cooling system. If it appears
to be functioning properly, run the engine at 1200–1500 rpm with the transmission
in N (Neutral). This should reduce the transmission and engine temperatures to
normal operating levels in 2 or 3 minutes. If temperatures do not decrease, reduce
the engine rpm.
If the engine temperature indicates a high temperature, an engine or radiator
problem is indicated. If high temperature in either the engine or transmission
persists, stop the engine and have the overheating condition investigated by
maintenance personnel.

61
PARKING BRAKE
WARNING: If you leave the vehicle and the engine is running, the
vehicle can move unexpectedly and you or others could be injured. If
you must leave the engine running, DO NOT LEAVE the vehicle until
you have completed all of the following procedures:
• Put the transmission in N (Neutral).
• Be sure the engine is at low idle (500–800 rpm).
• Apply the parking brake and emergency brake and make sure they
are properly engaged.
• Chock the wheels and take other steps necessary to keep the
vehicle from moving.

The parking brake is only intended to secure an unattended vehicle with the
engine ignition OFF. Always maintain the vehicle parking brake system according
to the manufacturer’s specifications. The parking brake may not have sufficient
capacity to restrain a vehicle with the engine running and the transmission in a
forward or reverse range. When the vehicle is unattended and the engine is in
operation, the transmission must be in N (Neutral) with the brakes fully applied
and the wheels chocked.

TOWING OR PUSHING
CAUTION: Failure to lift the driving wheels off the road, disconnect
the driveline, or remove the axle shafts before pushing or towing can
cause serious transmission damage.

The engine cannot be started by pushing or towing. Before pushing or towing a

vehicle do one of the following:
• Disconnect the driveline.
• Lift the drive wheels off the road.
• Remove the axle shafts from the drive wheels.
An auxiliary air supply will usually be required to actuate the vehicle brake
system.
When the axle shafts are removed, be sure to cover the wheel openings to prevent
loss of lubricant and entry of dust and dirt.

TURNING OFF THE VEHICLE

Always select N (Neutral) before turning off the vehicle engine.

62
PRIMARY/SECONDARY SHIFT SCHEDULES
The points at which shifts occur depend upon predetermined speeds and other
operating conditions. A transmission “shift calibration” includes several sets of
shift points which may be used according to current or anticipated operating
conditions. Some shift schedules may be inhibited as a result of operating
conditions, such as engine or transmission fluid temperature. Shift schedules may
be changed using the MODE button (some applications may use a dash-mounted
switch)—which is typically associated with a change in anticipated vehicle
operation.
The TCM/ECU includes the capacity for two separate and distinct shift
calibrations (customer-selectable), one for use in “Primary Mode” of operation and
one in “Secondary Mode.”
• Primary—This shift schedule is typically used for all normal vehicle
operations.
• Secondary—This is an alternate shift schedule that the TCM/ECU uses
upon request. Not all vehicles will be equipped with a secondary shift
schedule. The request can be interlocked with a vehicle component, or be
operator-controlled using the MODE button.
Your vehicle may have a dash-mounted light that illuminates when the secondary
mode is active.

CRUISE CONTROL OPERATION

Operating an Allison transmission-equipped vehicle on cruise control may cause
the transmission to shift cycle if the cruise control speed setting is set too close to
a scheduled shift point. One of the following actions may eliminate shift cycling:
• Select the secondary shift schedule by pushing the MODE button (refer to
Figure 8 through Figure 10) on the shift selector.
• Select a lower range by pushing the ↓ (Down) Arrow or moving the lever
on the shift selector.
• Change the cruise control setting away from the shift point.
Some vehicles equipped with an engine brake will have the engine brake
controlled by the TCM/ECU. This is done so the transmission will automatically
select a lower range when the engine brake is turned on and the throttle is near
idle position.
Operating a vehicle on cruise control with the engine brake turned on and
controlled by the transmission TCM/ECU, may cause an unwanted application of
the engine brake when the cruise control decelerates for downhill grades.
Eliminate this condition by turning off the engine brake while operating the
vehicle on cruise control.

63
OPERATING DOWN STEEP GRADES
(REAR-DISCHARGE MIXER)
CAUTION: With this transmission, the service brakes must be used
when backing a loaded rear-discharge mixer down a grade. But too
much brake application, particularly on an unpaved surface, can lock the
front brakes and reduce steering control. A crash could then occur. To
help prevent injury or property damage:
1. Drive forward down the grade and then exit by backing up the
grade when you can do so.
2. If equipped, use the trailer brake when backing the mixer down a
grade. Do not use the trailer brake as a parking brake once the
vehicle is at the bottom of the grade.
3. If a trailer brake is not available, back the mixer down the grade
by modulating the service brakes to control and maintain a safe,
steady vehicle speed. Avoid abrupt stops and starts.

64
 POWER TAKEOFF OPERATION

ENGINE-DRIVEN POWER TAKEOFF (PTO)

CAUTION: Do not exceed the engagement and operational speed limits
imposed on the driven equipment during the operation of the PTO.
Exceeding the speed limits produces high hydraulic pressure in the PTO
that can damage the PTO components. Consult the vehicle
manufacturer’s literature for these speed limits.

If a PTO is present, it will normally be mounted on either the left or right side of
the 3000 Product Family transmission. On the 4000 Product Family transmission,
the PTO will be located on the left side or on the top of the transmission. The
PTO drive gear is engine-driven and therefore provides direct engine power. The
PTO can be operated when the vehicle is either moving or stopped.
The PTO gear is in constant mesh with the drive gear in the converter housing.
However, the PTO may either be constant-drive (output always powered) or
clutch-driven. When the PTO is clutch-driven, the clutch is part of the PTO, not
the transmission. A clutch-driven PTO is powered only when the PTO clutch is
engaged.
All Allison transmission-equipped vehicles with PTO enable have engagement and
operational speed limits programmed into the TCM/ECU to help protect PTO
equipment. Be sure the limits for PTO engagement speed and operational speed
are not exceeded. Consult the vehicle manufacturer’s literature for these speed
limits. Some speed limits have default values which are programmed out of the
operating range and will need to be set for your particular PTO duty cycle.
Consult your vehicle manufacturer to see if your transmission has been
programmed and what operational limits have been established.
When the programmed engagement speed is exceeded, the PTO will not engage.
The PTO engagement must be retried after the speed has been reduced. When
operational speeds (either engine or transmission output) are exceeded, the PTO
will deactivate and the PTO engagement process must be repeated.

65
 CARE AND MAINTENANCE

PERIODIC INSPECTIONS
Careful attention to the fluid level and connections for the electronic and hydraulic
circuits is very important.
For easier inspection, the transmission should be kept clean. Make regular periodic
inspections for:
• Loose bolts.
• Leaking fluid around fittings, lines, and transmission openings.
• The condition of the electrical harnesses.
• The presence of transmission fluid in the engine cooling system and
transmission fluid for the presence of coolant, which would indicate a faulty
oil cooler.
• A clean and dirt and debris free breather (refer to Figure 4 through
Figure 7) to make sure it is clean and free from dirt or debris.
Report any abnormal condition to service management.

PREVENT MAJOR PROBLEMS

You can help keep minor problems from becoming major problems by contacting
an Allison Transmission distributor or dealer when one of these conditions occur:
• Shifting feels odd.
• Transmission leaks fluid.
• Unusual transmission-related sounds (changes in sound caused by normal
engine thermostatic fan cycling, while climbing a long grade with a heavy
load, have been mistaken for transmission-related sounds).
• CHECK TRANS light comes on frequently.

66
IMPORTANCE OF PROPER FLUID LEVEL
It is important that the proper fluid level be maintained at all times because the
transmission fluid cools, lubricates, and transmits hydraulic power. If the fluid
level is too low, the converter and clutches do not receive an adequate supply of
fluid. If fluid level is too high, the fluid can aerate. Aerated fluid can cause the
transmission to shift erratically or overheat.
An oil level sensor (OLS) is optional on all WTEC III transmissions, standard on
Allison 4th Generation 3000 and 4000 Product Families transmissions through
six-speed, and optional on 4700 RDS. The OLS allows the operator to obtain an
indication of the fluid level from the full-function shift selector. However, no OLS
information is available unless the OLS is “autodetected” by the TCM/ECU.
Frequently look for the presence of oil level diagnostics if the transmission is
known to contain an OLS. If an OLS is not detected during a fixed number of
engine starts, the TCM/ECU concludes that no OLS is present. If an OLS is
known to be present, but has not been detected, then troubleshooting of the OLS
circuit is required. After the OLS circuit is repaired, reset “autodetect” or
manually select the OLS function using Allison DOC™ For PC–Service Tool. For
detailed troubleshooting procedures refer to the Troubleshooting Manual. Refer to
the SERVICE LITERATURE section for specific publication numbers.

NOTE: To correctly determine the transmission fluid level using the

dipstick, the transmission fluid must be at operating temperature.
The oil level sensor method of determining the fluid level compensates
for transmission fluid temperature between 60°C–104°C (140°F–220°F).
Any temperature below 60°C (140°F) or above 104°C (220°F) will
result in an Invalid for Display condition.

WTEC III FLUID LEVEL CHECK USING ALLISON SHIFT

SELECTORS
The oil level sensor (OLS) is optional on all 3000 and 4000 Product Families
transmissions. The transmission must be equipped with the oil level sensor to be
able to read fluid level information.

NOTE: WTEC III Controls pushbutton and lever shift selectors display
fluid level information one character at a time.

To access fluid level information (refer to Figure 11):

1. Park the vehicle on a level surface, shift to N (Neutral), and apply the
parking brake.

67
 HOLD OVERRIDE BUTTON HOLD OVERRIDE
BUTTON
MODE INDICATOR
MODE INDICATOR
(LED)
(LED) R
1
2
MODE MODE BUTTON MODE
R
N
MODE
N

3 D MODE BUTTON D
5
4
MODE ID 6
5
MODE ID 4
5
3
D 4
N DIGITAL DISPLAY* 3 DIGITAL DISPLAY* 2
1
R 2
1

DISPLAY MODE/ DISPLAY MODE/

DIAGNOSTIC BUTTON DIAGNOSTIC BUTTON
SIX-SPEED, SEVEN-SPEED,
CONTOURED
LEFT-HAND RIGHT-HAND
BEZEL
LEVER SELECTOR LEVER SELECTOR
WITH REVERSE WITH REVERSE
IN REAR TO FRONT

DIGITAL DISPLAY*
MODE ID
MODE INDICATOR (LED)
R MODE
R MODE
MODE BUTTON
N
N
Push simultaneously D
D to enter diagnostic
mode and fluid
level check

PUSHBUTTON SELECTORS
* NOTE: Number displayed is highest forward range available in selected position.
Visually check to confirm that the range selected was attained.
If display is flashing, shift is inhibited.
V10689.00.01

Figure 11. Typical WTEC III Allison Shift Selectors

2. Pushbutton shift selector—simultaneously press the ↑ (Up) and
↓ (Down) Arrow buttons once.
3. Lever shift selector—press the DISPLAY MODE/DIAGNOSTIC button
one time.
The fluid level check may be delayed until the following conditions have been
met:
• The fluid temperature is above 60°C (140°F) and below 104°C (220°F).
• The transmission is in N (Neutral).
• The engine is at idle.
• The transmission output shaft is stopped.
• The vehicle has been stationary for approximately two minutes to allow the
fluid to settle.

68
A delayed fluid level check is indicated by a “—” in the single digit display
followed by a numerical countdown. The countdown, from 8 to 1, indicates the
time remaining in the two minute waiting period.
The following is an explanation of what will appear in the single digital display.
• Correct Fluid Level
— “o L” (represents Fluid (oil) Level Check Mode)
— “o K” (fluid level is within the correct fluid level zone)

NOTE: The sensor display and the dipstick may not agree exactly
because the OLS compensates for fluid temperature.

• Low Fluid Level

— “o L” (represents Fluid (oil) Level Check Mode)
— “L o” (represents low fluid level, and is followed by a number of
quarts the transmission is low)
Example: o L L o 0 2
Where “2” indicates that 2 additional quarts of fluid will bring the
fluid level within the middle of the “o K” zone.
• High Fluid Level
— “o L” (represents Fluid (oil) Level Check Mode)
— “H I” (represents high fluid level followed by a number of quarts the
transmission is high)
Example: o L H I 0 1
Where “1” indicates 1 quart of fluid above the full transmission level.
• Invalid for Display
— “o L” (represents Fluid (oil) Level Check Mode)
— “—”
The dash is followed by a numerical display which is a fault code that
indicates conditions are not proper to receive the fluid level
information or there is a system malfunction. The fault codes that may
be encountered are shown in the following Table 1, Fluid Level Fault
Codes.

Table 1. Fluid Level Fault Codes

Display Cause of Code

o,L,—, 0, X Settling time too short*
o,L,—, 5, 0 Engine speed (rpm) too low
o,L,—, 5, 9 Engine speed (rpm) too high

69
 Table 1. Fluid Level Fault Codes (cont’d)
Display Cause of Code
o,L,—, 6, 5 Neutral must be selected
o,L,—, 7, 0 Sump fluid temperature too low
o,L,—, 7, 9 Sump fluid temperature too high
o,L,—, 8, 9 Output shaft rotation
o,L,—, 9, 5 Sensor failure**
* A number between 8 and 1 that flashes during the countdown period.
** Speed sensor, throttle position sensor, temperature sensor, or oil level sensor failure should be
reported to a distributor or dealer in your area (consult the telephone directory for an Allison
Transmission distributor or dealer).

CAUTION: A low or high fluid level can cause overheating and

irregular shift patterns. Incorrect fluid level can damage the
transmission.

To exit the Fluid Level Display Mode, press any range button on the pushbutton
shift selector or press the DISPLAY MODE/DIAGNOSTIC button once on the
lever shift selector.

ALLISON 4TH GENERATION MY09 PROGNOSTICS

DISABLED AND SEVEN SPEED TRANSMISSION FLUID
LEVEL CHECK USING ALLISON SHIFT SELECTORS
The transmission must be equipped with the OLS to be able to read fluid level
information. The oil level sensor (OLS) is standard on 3000 and 4000 Product
Families transmissions (optional on the 4700 RDS).

NOTE: Allison 4th Generation pushbutton and lever shift selectors have
two digital displays, SELECT and MONITOR. The fluid level
information is displayed two characters at a time.

To access oil level information (refer to Figure 12):

1. Park the vehicle on a level surface, shift to N (Neutral), and apply the
parking brake.
2. Pushbutton shift selector—simultaneously press the ↑ (Up) and
↓ (Down) Arrow buttons once.
3. Lever shift selector—press the DISPLAY MODE/DIAGNOSTIC button
once.
The fluid level check may be delayed until the following conditions are met:
• The fluid temperature is above 60°C (140°F) and below 104°C (220°F).

70
 HOLD OVERRIDE
BUTTON HOLD OVERRIDE
MODE ID BUTTON

MODE INDICATOR MODE INDICATOR

(LED) (LED)
1 R
2 N
3 MODE BUTTON D MODE BUTTON
4 6 7 6
6
5
5
1 1 4 1
D
3 DIGITAL DISPLAY*
N
R DIGITAL DISPLAY * 2
1

DISPLAY MODE DISPLAY MODE

DIAGNOSTIC BUTTON DIAGNOSTIC BUTTON
SIX-SPEED, SEVEN-SPEED, CONTOURED
LEFT-HAND RIGHT-HAND BEZEL
LEVER SELECTOR LEVER SELECTOR
WITH REVERSE WITH REVERSE
TO REAR TO FRONT

DIGITAL DISPLAY *
MODE ID
7 1
MODE 6
MODE
INDICATOR (LED) 1
MODE BUTTON
Push simultaneously
to enter diagnostic
mode and fluid
level check

PUSHBUTTON SELECTORS
* NOTE: The first number displayed in the digital display is the highest forward range available and
second number is range attained in selected position.
Visually confirm that the range selected was attained. If display is flashing, shift is inhibited. V10694.00.01

Figure 12. Typical Allison 4th Generation Shift Selectors

• The transmission is in N (Neutral).
• The engine is at idle.
• The transmission output shaft is stopped.
• The vehicle has been stationary for approximately two minutes to allow the
fluid to settle.
A delayed fluid level check is indicated by a “–” in each of the digital displays
(SELECT and MONITOR) followed by a numerical countdown. The countdown,
from 8 to 1, indicates the time remaining in the two minute waiting period.
The following is an explanation of what will appear in the SELECT and
MONITOR digital displays.
• Correct Fluid Level

SELECT MONITOR Description

“o” “L” Represents Fluid (oil) Level Check Mode

71
SELECT MONITOR Description
Fluid level is within the correct fluid level
“o” “K”
zone

NOTE: The sensor display and the dipstick may not agree exactly
because the OLS compensates for fluid temperature.

• Low Fluid Level

SELECT MONITOR Description

“o” “L” Represents Fluid (oil) Level Check Mode
“L” “o” Represents Low Oil Level
“0” “2” The number of quarts the transmission is low

• High Fluid Level

SELECT MONITOR Description

“o” “L” Represents Fluid (oil) Level Check Mode
“H” “I” Represents High Oil Level
The number 1 indicates 1 quart of fluid above
“0” “1”
the full transmission level

• Invalid for Display

SELECT MONITOR Description

“o” “L” Represents Fluid (oil) Level Check Mode
The dashes are followed by a numerical
display which is a fault code that indicates
conditions are not proper to receive the fluid
“–” “–” level information or there is a system
malfunction. The fault codes that may be
encountered are shown in Table 2, Fluid
Level Fault Codes.

72
 Table 2. Fluid Level Fault Codes

Display (MY08,
Display (Previous) Cause of Code
Cal/Sfw or current)
oL, - -,0X oL, - -,0X Settling time too short*
oL, - -,50 oL, - -,EL Engine speed (rpm) too low
oL, - -,59 oL, - -,EH Engine speed (rpm) too high
oL, - -,65 oL, - -,SN Neutral must be selected
oL, - -,70 oL, - -,TL Sump fluid temperature too low
oL, - -,79 oL, - -,TH Sump fluid temperature too high
oL, - -,89 oL, - -,SH Output shaft rotation
oL, - -,95 oL, - -,FL Sensor failure**
* A number between 8 and 1 that flashes during the countdown period.
** Speed sensor, throttle position sensor, temperature sensor, or oil level sensor failure should be
reported to a distributor or dealer in your area (consult the telephone directory for an Allison
Transmission distributor or dealer).

CAUTION: A low or high fluid level can cause overheating and

irregular shift patterns. Incorrect fluid level can damage the
transmission.

NOTE: To exit the fluid level display mode, press any range button on
the pushbutton shift selector, or press the DISPLAY MODE/
DIAGNOSTIC button once on the lever shift selector.

PROGNOSTICS FUNCTIONALITY FOR MODEL YEAR 2009

NOTE: Prognostics enabled requires the use of Allison Approved
TES 295 transmission fluid and Allison High Capacity Filters. If any
other fluids or filters are used, Prognostics must be DISABLED.
Prognostics information will not be accurate with any other fluid or
filters and could result in missed maintenance activities resulting in
transmission damage.

The three Prognostics functions are enabled or disabled as a group and cannot be
enabled or disabled individually. The OEM is the one who advises Allison
whether the Allison Prognostics feature should be available and functional in the
calibration installed in the TCM. The OEM may specify to enable the feature and
also default them to run (turn them on), enable the feature but keep them turned
off (not run by default but could be turned on with the Allison DOC™
re-programming tool) or finally disabled in the calibration and cannot be turned on

73
by Allison DOC™ re-programming tool. The OEM may also specify whether or
not Prognostics may be reset by the Allison shift selector, J1939 message, or only
with the use of the Allison DOC™ For PC–Service Tool.

Refer to Table 4A and Table 4B for instructions to access Prognostics Functions

through the shift selectors.

Oil Life Monitor (OM). Oil life is calculated based on hours of engine and
transmission operation. Miles will be approximated from the hours and calibrated
information. The number of shifts per mile will determine the duty cycle of the
transmission and the oil life limits will be based on the observed duty cycle.
Hours will be accumulated when the engine is running including when the vehicle
is stationary for PTO operation or for extended idle time.
Oil life is calculated on the following:
• Operating hours
• Output revolutions
• Shift density
• Retarder accumulator applies.
Calendar based fluid requirements (refer to FLUID AND FILTER CHANGE
INTERVAL RECOMMENDATIONS at the end of this section) still apply because
Oil Life Monitor cannot measure time while ignition power is OFF. If the OM has
not indicated the need for a fluid change before 60 months (five years) have
passed, it will be necessary to change the fluid and filters per calendar
requirements and reset the system.
Oil life Monitor displays the percentage of life remaining as follows:
• Allison Transmission shift selector display—fluid life remaining will be
displayed from 99 percent down to 00 percent.
• Allison DOC™ For PC–Service Tool—fluid life remaining will be
displayed from 100 percent down to –100 percent.
• When maintenance is required, the service icon will come on steady at “key
on” and remain on for about two minutes after D (Drive) has been selected.
If transmission maintenance continues to be unattended, the CHECK
TRANS light will illuminate and diagnostic code P0897, Transmission
Fluid at Limit, will be set. This indicates that the remaining fluid life has
reached 1 percent.
If reset is not restricted to the service tool only, a J1939 message can be sent to
reset. Also, an Allison shift selector reset may be accomplished by one of the
following methods:
• Display the Oil Life Monitor information and press and hold the MODE
button for ten seconds.

74
 • With the ignition ON and the engine OFF, shift between N-D-N-D-N-R-N
to reset the value displayed to 99.
The manual reset method is shown in the Allison DOC™ For PC–Service Tool in
the Prognostics Customer Modified Constant (CMC) Group and can be set to
restrict reset to the service tool only. If resets are restricted to the service tool
only, they may be made by using the specific Action Request in the Allison
DOC™ For PC–Service Tool.
The service indicator icon will illuminate briefly following a reset to acknowledge
that the reset was successful. The Allison DOC™ For PC–Service Tool may be
used to review reset history and the mileage recorded at the time of reset.

Filter Life Monitor (FM). Filter Life Monitor is used to indicate when the filters
(main and lube) require changing (3-, 4-, 5-, and 6-speed transmissions only). The
Prognostics pressure switch is activated when fluid exiting the main filter drops
below a pre-determined pressure. Both the main and lube filters must be changed
when the service icon indicates the main filter should be changed. The differential
pressure limit is verified for a period of time to be sure there is no false indication
of the need to change filters.
The Filter Life Monitor displays the filter condition as follows:
• Allison Transmission shift selector either OK or LO
• Allison DOC™ For PC–Service Tool indicates the Filter Life Monitor
Expired as YES or NO.
When a filter change is indicated, diagnostic code P088A, Transmission Filter
At/Over Limit, is set and the service icon will flash at “key on” and continue to
flash for approximately two minutes after D (Drive) has been selected, then go
out. If the filters are not changed and the indicator reset, the CHECK TRANS
light will illuminate and diagnostic code P088B, Transmission Filter At/Over
Limit, will be set to indicate a deteriorated filter condition.
When new filters have been installed, the Filter Life Monitor will automatically
reset after a period of time without a signal from the Prognostic pressure switch.
A manual reset method is shown in the Allison DOC™ For PC–Service Tool in
the Prognostics CMC Group. The Prognostics CMC can be set to restrict reset to
the Allison DOC™ For PC–Service Tool. If reset is not restricted, a J1939
message may be sent to reset or shift selector resets may be performed by one of
the following methods:
• With the ignition ON and the engine OFF, shift between N-R-N-R-N-D-N
to reset the value displayed on the shift selector to OK.
• Display the Filter Life Monitor information and press and hold the MODE
button of an Allison shift selector for ten seconds.
If resets are restricted to the service tool only, they may be made by using the
specific Action Request in the Allison DOC™ For PC–Service Tool.

75
Transmission Health Monitor (TM). The Transmission Health function monitors
the clutch system based on adaptive control parameter change over time. Clutch
life is monitored for C1, C2, C3, C4, and C5 clutches only.
Transmission Health displays as follows:
• Allison shift selector—OK until the remaining life of one or more of the
clutches indicates an issue to display LO. The specific clutch(es) for which
the shift selector reads LO cannot be identified using the shift selector
display.
• Allison DOC™ For PC–Service Tool displays clutch condition as OK or
NOT OK for each clutch, C1 through C5.
• NA is displayed until transmission is adapted.
When one or more clutches indicate the need for replacement, at “key on” the
service icon on the Allison shift selector will come on steady and remain on
steady at all times during vehicle operation. The display will show “LO”. This is
caused by the change in calculated clutch free running clearance exceeding the
wear-out state. Additional troubleshooting is required to be sure clutches require
replacing.
Failure to perform maintenance/repair after a number of warnings will result in the
CHECK TRANS light illuminating and diagnostic code P2789, Clutch Adaptive
Learning at Limit, being set. Reset will occur automatically when the clutch life
recalculates below wear-out state (free running clearances calculate less than
service limits). Manual reset is possible only through the correct Action Request
in the Allison DOC™ For PC–Service Tool.
The Allison DOC™ For PC–Service Tool will be able to review the amount of
transmission operation from the triggering event until service reset.

ALLISON 4TH GENERATION MY09 PROGNOSTICS

ENABLED FLUID LEVEL CHECK USING ALLISON SHIFT
SELECTORS
NOTE: Use this section for six-speed transmissions when Prognostics
have been ENABLED.

The transmission must be equipped with an OLS to be able to read fluid level
information. The oil level sensor (OLS) is standard on 3000 and 4000 Product
Families transmissions (optional on the 4700 RDS).

NOTE: Allison 4th Generation pushbutton and lever shift selectors have
two digital displays, SELECT and MONITOR. The fluid level
information is displayed two characters at a time.

76
 HOLD OVERRIDE HOLD OVERRIDE
BUTTON BUTTON

MODE
MODE ID INDICATOR
MODE (LED)
INDICATOR R MODE BUTTON
1 (LED) N
2
D
MODE ID
3 MODE BUTTON
6
4
5 DIGITAL
5
D
DIGITAL DISPLAY * 4 DISPLAY *
3
N
2
R DISPLAY MODE 1
DISPLAY MODE
DIAGNOSTIC DIAGNOSTIC
BUTTON BUTTON

SIX-SPEED, SEVEN-SPEED, CONTOURED

LEFT-HAND RIGHT-HAND BEZEL
LEVER SELECTOR LEVER SELECTOR

DIGITAL DISPLAY*
MODE ID
MODE
R MODE MODE
INDICATOR (LED)
R MODE
MODE BUTTON
N
N Push simultaneously
D to enter diagnostic
D mode and fluid
level check

PUSHBUTTON SELECTORS

*NOTE: The first number displayed in the digital display is the highest forward range available and second
number is range attained in selected position.

Visually confirm that the range selected was attained. If display is flashing, shift is inhibited.

SERVICE ICON
SERVICE ICON

Location of service icon on vertical and horizontal digital display V11058.00.00

Figure 13. Typical Allison 4th Generation MY09 Prognostics Shift

Selectors

77
To access oil level information (refer to Figure 13):
1. Park the vehicle on a level surface, shift to N (Neutral), and apply the
parking brake.
2. Pushbutton shift selector—simultaneously press the ↑ (Up) and
↓ (Down) Arrow buttons once.
3. Lever shift selector—press the DISPLAY MODE/DIAGNOSTIC button
one time.
The fluid level check may be delayed until the following conditions have been
met:
• The fluid temperature is above 60°C (140°F) and below 104°C (220°F).
• The transmission is in N (Neutral).
• The engine is at idle.
• The transmission output shaft is stopped.
• The vehicle has been stationary for approximately two minutes to allow the
fluid to settle.
A delayed fluid level check is indicated by a “—” in each of the digital displays
(SELECT and MONITOR) followed by a numerical countdown. The countdown,
from 8 to 1, indicates the time remaining in the two minute waiting period.
A numerical display (alphabetical for MY08) is a fault code and indicates
conditions are not proper to receive the fluid level information, or that there is a
system malfunction.
• Correct Fluid Level—“o, L” is displayed (represents Fluid (Oil) Level
Check Mode), followed by “o, K”. The “o, K” display indicates the fluid is
within the correct fluid level zone. The sensor display and the transmission
dipstick may not agree exactly because the oil level sensor compensates for
fluid temperature.
• Low Fluid Level—“o, L” is displayed (represents Fluid (Oil) Level Check
Mode) and the number of quarts the transmission fluid is low. Example: “2”
indicates 2 additional quarts will bring the fluid level within the middle of
the “o, K” zone.
• High Fluid Level—“o, L” is displayed (represents Fluid (Oil) Level Check
Mode), followed by “HI” (represents High Oil Level) and the number of
quarts the transmission is overfilled. Example: “1” indicates 1 quart of fluid
above the full transmission level.
• Invalid For Display—“o, L” (represents Fluid (Oil) Level Check Mode),
followed by “—” and a numerical display (alphabetical for MY08 and
newer). The numerical display (alphabetical for MY08 and newer) is a fault
code and indicates conditions are not proper to receive the fluid level
information, or there is a system malfunction. The fault codes that may be
encountered are shown in Table 3, Fluid Level Fault Codes, below.

78
 Table 3. Fluid Level Fault Codes

Display
Display (MY08,
Cause of Code
(Former) Cal/Sfw or
newer)
oL, - -, 0X oL, - -, 0X Settling time too short*
oL, - -, 50 oL, - -, EL Engine speed (rpm) too low
oL, - -, 59 oL, - -, EH Engine speed (rpm) too high
oL, - -, 65 oL, - -, SN Neutral must be selected
oL, - -, 70 oL, - -, TL Sump fluid temperature too low
oL, - -, 79 oL, - -, TH Sump fluid temperature too high
oL, - -, 89 oL, - -, SH Output shaft rotation
oL, - -, 95 oL, - -, FL Sensor failure**
* A number between 8 and 1 that flashes during the countdown period.
** Speed sensor, throttle position sensor, temperature sensor, or oil level sensor failure should be
reported to a distributor or dealer in your area (consult the telephone directory for an Allison
Transmission distributor or dealer).

CAUTION: A low or high fluid level can cause overheating and

irregular shift patterns. Incorrect fluid level can damage the
transmission.

Allison Shift Selector Service Indicator. The following tables illustrate how to
access each Prognostic function on the Allison pushbutton and lever shift
selectors.

79
 Table 4A. Allison Pushbutton Shift Selectors

Up/Down Arrow
Buttons Pressed Indications SELECT MONITOR
Simultaneously
Delayed fluid level check. The
dashes are followed by a
countdown from 8 down to 1
or a numerical (alphabetical for
MY08) fault code that indicates
conditions are not proper to
“–” “–”
receive the fluid level
information or there is a system
malfunction. The fault codes
that may be encountered are
1st press (A shown in the Fluid Level Fault
delayed fluid level Codes table above.
check may occur) Fluid level “o” “L”
Fluid level is within the correct
“o” “K”
fluid level zone
Represents low fluid level “L” “o”
The number of quarts the
“0” “2”
transmission is low
Represents high fluid level “H” “I”
The number 1 indicates 1 quart
of fluid above the full “0” “1”
transmission level
Oil Life Monitor “O” “M”
“some
“some
2nd press Oil life remaining will range number
number
from 99 percent down to 00 from 9 to
from 9 to 0”
0”
Filter Life Monitor “F” “M”
3rd press Present life of filters is OK “O” “K”
Present life of filters is low “L” “O”
Transmission Health Monitor “T” “M”
OK until the remaining life of
one or more of the clutch(es)
“O” “K”
wear enough so that the
4th press
programming changes
One or more of the clutches
have worn enough to change “L” “O”
the program*

80
 Table 4A. Allison Pushbutton Shift Selectors (cont’d)
Up/Down Arrow
Buttons Pressed Indications SELECT MONITOR
Simultaneously
Press and hold MODE button to reset display monitor (Oil Life Monitor and
Filter Life Monitor). Clear diagnostic codes when displaying any code.
* The specific clutch(es) which caused the indication to read “LO” cannot be determined by the
shift selector

Table 4B. Allison Lever Shift Selectors

DISPLAY
MODE/
DIAGNOSTIC Indications SELECT MONITOR
Button (DMD)
Pressed
Delayed fluid level check.
The dashes are followed by a
countdown from 8 down to 1
or a numerical (alphabetical
for MY08) fault code that
indicates conditions are not
proper to receive the fluid “–” “–”
level information or there is a
system malfunction. The fault
codes that may be
1st DMD button encountered are shown in the
press (A delayed Fluid Level Fault Codes table
fluid level check above.
may occur) Fluid level “o” “L”
Fluid level is within the
“o” “K”
correct fluid level zone
Represents low fluid level “L” “o”
The number of quarts the
“0” “2”
transmission is low
Represents high fluid level “H” “I”
The number 1 indicates 1
quart of fluid above the full “0” “1”
transmission level

81
 Table 4B. Allison Lever Shift Selectors (cont’d)
DISPLAY
MODE/
DIAGNOSTIC Indications SELECT MONITOR
Button (DMD)
Pressed
Oil Life Monitor “O” “M”
Present life of fluid is OK “O” “K”
2nd DMD button “some
press Oil life remaining will range “some number number
from 99 down to 00 from 9 to 0” from 9 to
0”
Filter Life Monitor “F” “M”
3rd DMD button
Present life of filters is OK “O” “K”
press
Present life of filters is low “L” “O”
Transmission Health Monitor “T” “M”
OK until the remaining life of
one or more of the clutch(es)
“O” “K”
4th DMD button wear enough so that the
press programming changes
One or more of the clutches
have worn enough to change “L” “O”
the program*
Press and hold MODE button to reset display monitor (Oil Life Monitor and
Filter Life Monitor). Clear diagnostic codes when displaying any code.
* The specific clutch(es) which caused the indication to read “LO” cannot be determined by the
shift selector

To exit the fluid level display mode, press any range button on the pushbutton
shift selector or press the DISPLAY MODE/DIAGNOSTIC button on the lever
shift selector.

FLUID LEVEL CHECK USING DIAGNOSTIC TOOLS

The transmission must be equipped with the oil level sensor to be able to read
fluid level information.
1. Park the vehicle on a level surface and shift to N (Neutral). Apply the
parking brake and/or emergency brakes.
2. Obtain fluid level information by following the procedure in the Allison
DOC™ For PC User Guide, GN3433EN or by using the OEM-supplied
auxiliary display.
3. Fluid level information may be delayed when certain conditions are not
met. The Allison DOC™ for PC–Service Tool will display a message

82
 showing which conditions have not been met. The following conditions
may delay the fluid level determination procedure:
— Settling time too short
— Engine speed (rpm) too low
— Engine speed (rpm) too high
— N (Neutral) must be selected
— Sump fluid temperature too low (below 60°C or 140°F)
— Sump fluid temperature too high (above 104°C or 220°F)
— Output shaft rotation
— Sensor failure

MANUAL FLUID CHECK PROCEDURE

Refer to Figure 4 through Figure 7 for the location of the fill tube and dipstick.

WARNING: If you leave the vehicle and the engine is running, the
vehicle can move unexpectedly and you or others could be injured. If
you must leave the engine running, do not leave the vehicle until you
have completed all of the following procedures:
1. Put the transmission in N (Neutral).
2. Be sure the engine is at low idle (500–800 rpm).
3. Apply the parking brakes and emergency brake and make sure
they are properly engaged.
4. Chock the wheels and take any other steps necessary to keep the
vehicle from moving.

Clean around the end of the fill tube before removing the dipstick. This will aid in
preventing dirt or foreign matter from entering the hydraulic system, which can
cause:
• Valves to stick.
• Undue wear of transmission parts.
• Clogged passages.
Determine that the fluid level is correct using the procedures in COLD CHECK
and HOT CHECK.

83
 3000 PRODUCT FAMILY 4000 PRODUCT FAMILY
6.35 mm (0.250 in.) REFERENCE
Blade can be as narrow as
4.76 mm (0.187 in.).

FULL
HOT
FILL
FILL TUBE

FULL
HOT
TUBE
ADD
HOT

ADD
COLD

HOT
FULL

A E
A E
B

COLD
FULL
B
C
C

COLD
ADD
COLD
ADD

D D
F F
TRANSMISSION CONTROL MODULE
SPLIT LINE

TRANSMISSION/SUMP DIMENSION DIMENSION DIMENSION DIMENSION DIMENSION DIMENSION

OIL SUMP
DESCRIPTION A B C D E F**
2.00 in. and 106.7 mm 76.2 mm 66.0 mm 132.6 mm 13.8 mm
4.00 in.**** 4000 PRODUCT FAMILY *
(4.20 in.) (3.00 in.) (2.60 in.) (5.22 in.) (0.54 in.)
101.6 mm 73.7 mm 50.8 mm 86.6 mm 5.9 mm
2.00 in.*** 3000 PRODUCT FAMILY (4.00 in.) (2.90 in.) (2.00 in.) * (3.41 in.) (0.23 in.)
101.6 mm 63.5 mm 45.7 mm 86.6 mm 5.9 mm
4.00 in.*** 3000 PRODUCT FAMILY (4.00 in.) (2.50 in.) (1.80 in.) * (3.41 in.) (0.23 in.)

NOTE: Calibrate level marking locations with respect to transmission control module
split line and fill tube.
Scale none.
*Dimension determined by installation.
**Reference dimension only. Actual dimension to be determined by installation.
***Reference drawing AS66-60.
****Reference drawing AS67-60.
V07301.00.01

Figure 14. Standard Transmission Dipstick Markings

84
COLD CHECK
The COLD CHECK determines if the transmission has enough fluid to be
operated safely until a HOT CHECK can be made.

NOTE: The correct fluid level cannot be determined unless the

transmission is in a level position.

CAUTION: DO NOT start the engine until the presence of sufficient

transmission fluid has been confirmed. Remove the transmission fluid
dipstick and be sure the static fluid level is near the HOT FULL mark.

CAUTION: The fluid level rises as fluid temperature rises. DO NOT fill
the transmission above the COLD CHECK band if the transmission fluid
is below normal operating temperature. During operation an overfull
transmission can become overheated, leading to transmission damage.

A COLD CHECK may be made after initial start-up and the presence of
transmission fluid has been confirmed—the sump fluid temperature is then
typically 16°–49°C (60°–120°F). To perform a COLD CHECK, do the following:
1. Move the vehicle to a level surface, put the transmission in N (Neutral),
and set the parking brake.
2. With the engine idling (500–800 rpm), shift to D (Drive) and then to
R (Reverse) to clear air from the hydraulic circuits.
3. Run the engine at idle (500–800 rpm) in N (Neutral) for about one minute.
4. Remove the dipstick and wipe it clean. Insert the dipstick into the fill tube,
pushing down until it stops.
5. Remove the dipstick and observe the fluid level. If the fluid on the dipstick
is within the COLD CHECK band (refer to Figure 14), the level is
satisfactory. If the fluid level is not within this band, add or drain fluid as
necessary to bring the level within the COLD CHECK band.
6. Perform a HOT CHECK at the first opportunity after normal operating
temperature (71°–93°C; 160°–200°F) is reached.

CAUTION: DO NOT operate the transmission for extended periods of

time until a HOT CHECK has verified proper fluid level. Transmission
damage can result from extended operation at improper fluid level
conditions.

85
 CAUTION: Obtain an accurate fluid level by imposing the following
conditions:
• Engine is idling (500–800 rpm) in N (Neutral)
• Transmission fluid is at the normal operating temperature
• The vehicle is on a level surface

HOT CHECK
The transmission fluid must be hot to obtain an accurate reading, because the
fluid level rises as the temperature increases.
To perform a HOT CHECK, do the following:
1. Be sure fluid has reached normal operating temperature (71°–93°C;
160°–200°F). If a transmission temperature gauge is not present, measure
fluid level when the engine water temperature gauge has stabilized and the
transmission has been operated under load for at least one hour.
2. Park the vehicle on a level surface and shift to N (Neutral). Apply the
parking brake and allow the engine to idle (500–800 rpm).
3. Remove the dipstick and wipe it clean. Insert the dipstick into the fill tube,
pushing down until it stops.
4. Remove the dipstick and observe the fluid level. The safe operating level is
anywhere within the HOT RUN band (refer to Figure 14) on the dipstick.
5. If the level is not within this band, add or drain fluid as necessary to bring
the level within the HOT RUN band.
6. Be sure fluid level measurements are consistent. Measure fluid level more
than once and if readings are not consistent, be sure the transmission
breather is clean and not clogged. If readings are still not consistent,
contact your nearest Allison distributor or dealer.

RECOMMENDED AUTOMATIC TRANSMISSION FLUID AND

VISCOSITY GRADE
Proper transmission fluid selection is important to transmission performance,
reliability, and durability. The following is a list, by preference of use, of Allison
approved transmission fluids.

NOTE: Consult the Allison Transmission web site at

www.allisontransmission.com for a current list of approved transmission
fluids. Select SERVICE, then Fluids.

86
• TES 295 approved fluids (required for MY09 Prognostics):
— Recommended for all 3000 and 4000 Product Families transmission
applications
— Fully qualified to the Allison TES 295 specification for Severe Duty
and Extended Drain Intervals
— Available through Allison distributors and dealerships
• TES 389 approved fluid:
— May be used in all 3000 and 4000 Product Families transmission
applications
— Must use Allison approved Non-TES 295 fluid/filter change schedule
that was previously assigned to DEXRON®-III fluid.
• DEXRON®-VI approved fluid:
— As of January 1, 2007, General Motors will no longer license
DEXRON®-III fluids. DEXRON®-VI fluids are suitable replacements.
— DEXRON®-VI may be used in all 3000 and 4000 Product Families
transmission applications after February 1, 2007, starting with serial
number 6510717075 for 3000 Product Family transmissions and serial
number 6610220990 for all 4000 Product Family transmissions.
— Must use the Allison approved Non-TES 295 fluid/filter change
schedule that was previously assigned to DEXRON®-III fluid.
• When choosing the optimum viscosity grade of fluid, duty cycle, preheat
capabilities, and/or geographical location must be taken into consideration.
The Transmission Fluid Operating Temperature Requirements table lists the
minimum fluid temperatures at which the transmission may be safely
operated without preheating. Preheat with auxiliary heating equipment or by
running the equipment or vehicle with the transmission in neutral for a
minimum of 20 minutes before attempting range operation.

CAUTION: Disregarding minimum fluid temperature limits may result

in transmission malfunction or reduced transmission life.

87
 Transmission Fluid Minimum Operating Temperature Requirements

Minimum Operating Temperature

Fluid Type
Celsius Fahrenheit
TES 295 –35 –31
MIL-PRF-46167 –32 –25
TES 389 –25 –13
DEXRON®-VI –25 –13

KEEPING FLUID CLEAN

CAUTION: Containers or fillers that have been used for antifreeze
solution or engine coolant must NEVER be used for transmission fluid.
Antifreeze and coolant solutions contain ethylene glycol which, if put
into the transmission, can cause the clutch plates and some seals to fail.

It is absolutely necessary that transmission fluid be clean. The fluid must be

handled in clean containers to prevent foreign material from entering the
transmission.

WTEC III, ALLISON 4TH GENERATION, AND MY09

PROGNOSTICS DISABLED FLUID AND INTERNAL FILTER
CHANGE INTERVAL RECOMMENDATIONS
NOTE: This section is to be used for all WTEC III and Allison 4th
Generation transmissions with MY09 Prognostics DISABLED. Refer to
Table 5 through Table 8 in this section.

CAUTION: Transmission fluid and filter change frequency is

determined by the severity of transmission service. To help avoid
transmission damage, more frequent changes may be necessary than
recommended in the general guidelines due to operating conditions and
duty cycle.

NOTE: Change fluid/filters at or before recommended mileage, months,

or hours have elapsed, whichever occurs first. For vehicles that average
less than 25 mph (40 kmh), operating hours represent a more reliable
measure of fluid life; therefore, fluid change intervals should not be
based on mileage only.

88
Allison Transmission requires all 3000 and 4000 Product Families transmissions
using the Gold Series filter to change the main filter (not the lube filter) after the
first 5000 miles (8000 km) or 200 hours of operation, whichever occurs first.
Gold Series filters may be identified by part numbers 29538231 or 29538232
stamped into the filter end cap.
Beginning with serial numbers 6510670912, 6610205144, 6520067342, and
6620002521, transmissions equipped with the Allison High Capacity filter do not
require an initial main filter change at 5000 miles (8000 km) or 200 hours.
High Capacity filters may be identified by part numbers 29545777 (3000 Product
Family) or 29545780 (4000 Product Family) stamped into the filter end cap.
Refer to the latest revision of Service Tips #1099 for convenient kit and fluid
information. Refer to the appropriate mechanic’s tips, latest revision, for location
of the main filter and fluid/filter change procedures. The latest revision of Service
Tips #1099 is available on the Allison Transmission web site under service. The
latest revision of the appropriate mechanic’s tips is available on the Allison
Transmission web site under publications. The web site is located at
www.allisontransmission.com.

CAUTION: Transmission fluid and filters must be changed whenever

there is evidence of dirt or high temperature conditions. A high
temperature condition is indicated when the transmission fluid is
discolored, has a strong odor, or has exceeded oil analysis limits.

89
 Table 5. Recommended Fluid/Filter Change Intervals for
3000 Product Family Transmissions with Gold Series Filter
NOTE: Change fluid/filters at or before recommended mileage, months, or hours have elapsed, whichever occurs first.
NOTE: Local conditions, severity of operation or duty cycle may require more or less frequent fluid change intervals that differ
from the published recommended fluid change intervals of Allison Transmission. Allison Transmission recommends that the
customer use fluid analysis as the primary method for determining fluid change intervals. In the absence of a fluid analysis
program, the fluid change intervals listed in the chart should be used.

SEVERE VOCATION* GENERAL VOCATION**

Filters Filters
Lube/ Lube/
Fluid Main Internal Auxiliary Fluid Main Internal Auxiliary
Schedule 1—Non-TES 295 Fluid
12,000 Miles 12,000 Miles 12,000 Miles 25,000 Miles 25,000 Miles 25,000 Miles
(20 000 km) (20 000 km) (20 000 km) (40 000 km) (40 000 km) (40 000 km)
Overhaul Overhaul
6 Months 6 Months 6 Months 12 Months 12 Months 12 Months

90
500 Hours 500 Hours 500 Hours 1000 Hours 1000 Hours 1000 Hours
Schedule 2—TES 295 Fluid***
75,000 Miles 75,000 Miles 75,000 Miles 150,000 Miles 75,000 Miles 75,000 Miles
(120 000 km) (120 000 km) (120 000 km) (240 000 km) (120 000 km) (120 000 km)
Overhaul Overhaul
36 Months 36 Months 36 Months 48 Months 36 Months 36 Months
3000 Hours 3000 Hours 3000 Hours 4000 Hours 3000 Hours 3000 Hours
* Transmissions with retarders or on/off highway.
** Transmissions without retarders and on highway only.
*** Recommendations in Schedule 2 are based on the transmission containing 100 percent TES 295 fluid and Allison Transmission Gold Series filters.
 Table 6. Recommended Fluid/Filter Change Intervals for
4000 Product Family Transmissions with Gold Series Filter
NOTE: Change fluid/filters at or before recommended mileage, months, or hours have elapsed, whichever occurs first.
NOTE: Local conditions, severity of operation or duty cycle may require more or less frequent fluid change intervals that differ
from the published recommended fluid change intervals of Allison Transmission. Allison Transmission recommends that the
customer use fluid analysis as the primary method for determining fluid change intervals. In the absence of a fluid analysis
program, the fluid change intervals listed in the chart should be used.

SEVERE VOCATION* GENERAL VOCATION**

Filters Filters
Lube/ Lube/
Fluid Main Internal Auxiliary Fluid Main Internal Auxiliary
Schedule 1—Non-TES 295 Fluid
12,000 Miles 12,000 Miles 12,000 Miles 25,000 Miles 25,000 Miles 25,000 Miles
(20 000 km) (20 000 km) (20 000 km) (40 000 km) (40 000 km) (40 000 km)
Overhaul Overhaul
6 Months 6 Months 6 Months 12 Months 12 Months 12 Months

91
500 Hours 500 Hours 500 Hours 1000 Hours 1000 Hours 1000 Hours
Schedule 2—TES 295 Fluid***
4 Inch Control Module (3.5 Inch Approximately)
75,000 Miles 75,000 Miles 75,000 Miles 150,000 Miles 75,000 Miles 75,000 Miles
(120 000 km) (120 000 km) (120 000 km) (240 000 km) (120 000 km) (120 000 km)
Overhaul Overhaul
36 Months 36 Months 36 Months 48 Months 36 Months 36 Months
3000 Hours 3000 Hours 3000 Hours 4000 Hours 3000 Hours 3000 Hours
* Transmissions with retarders or on/off highway.
** Transmissions without retarders and on highway only.
*** Recommendations in Schedule 2 are based on the transmission containing 100 percent TES 295 fluid and Allison Transmission Gold Series filters.
 Table 6. Recommended Fluid/Filter Change Intervals for
4000 Product Family Transmissions With Gold Series Filter(cont’d)
NOTE: Severe and General Vocations—local conditions, severity of operation, or duty cycle may require more or less frequent
fluid change intervals that differ from the published recommended fluid change intervals of Allison Transmission. Transmission
protection and fluid change intervals can be optimized by using fluid analysis. Filters must be changed at or before
recommended intervals. Change fluid/filter after recommended mileage, months, or hours have elapsed, whichever comes first.

SEVERE VOCATION* GENERAL VOCATION**

Filters Filters
Lube/ Lube/
Fluid Main Internal Auxiliary Fluid Main Internal Auxiliary
Schedule 3—TES 295 Fluid***
2 Inch Control Module (1.75 Inch Approximately)
50,000 Miles 50,000 Miles 50,000 Miles 150,000 Miles 50,000 Miles 50,000 Miles
(80 000 km) (80 000 km) (80 000 km) (240 000 km) (80 000 km) (80 000 km)
Overhaul Overhaul
24 Months 24 Months 24 Months 48 Months 24 Months 24 Months

92
2000 Hours 2000 Hours 2000 Hours 4000 Hours 2000 Hours 2000 Hours
* Transmissions with retarders or on/off highway.
** Transmissions without retarders and on highway only.
*** Recommendations in Schedule 2 and 3 are based on the transmission containing 100 percent TES 295 fluid and Allison Transmission Gold Series
filters.
 Table 7. Recommended Fluid/Filter Change Intervals for
3000 Product Family Transmission with High Capacity Filter
NOTE: Change fluid/filters at or before recommended mileage, months, or hours have elapsed, whichever occurs first.
NOTE: Local conditions, severity of operation or duty cycle may require more or less frequent fluid change intervals that differ
from the published recommended fluid change intervals of Allison Transmission. Allison Transmission recommends that the
customer use fluid analysis as the primary method for determining fluid change intervals. In the absence of a fluid analysis
program the fluid change intervals listed in the chart should be used.

SEVERE VOCATION* GENERAL VOCATION**

Filters Filters
Lube/ Lube/
Fluid Main Internal Auxiliary Fluid Main Internal Auxiliary
Schedule 1—Non-TES 295 Fluid
12,000 Miles 12,000 Miles 12,000 Miles 25,000 Miles 25,000 Miles 25,000 Miles
(20 000 km) (20 000 km) (20 000 km) (40 000 km) (40 000 km) (40 000 km)
Overhaul Overhaul
6 Months 6 Months 6 Months 12 Months 12 Months 12 Months

93
500 Hours 500 Hours 500 Hours 1000 Hours 1000 Hours 1000 Hours
Schedule 2—TES 295 Fluid***
150,000 Miles 75,000 Miles 75,000 Miles 300,000 Miles 75,000 Miles 75,000 Miles
(240 000 km) (120 000 km) (120 000 km) (480 000 km) (120 000 km) (120 000 km)
Overhaul Overhaul
48 Months 36 Months 36 Months 48 Months 36 Months 36 Months
6000 Hours 3000 Hours 3000 Hours 6000 Hours 3000 Hours 3000 Hours
* Transmissions with retarders or on/off highway.
** Transmissions without retarders and on highway only.
*** Recommendations in Schedule 2 are based on the transmission containing 100 percent TES 295 fluid and Allison Transmission Gold Series filters.
 Table 8. Recommended Fluid/Filter Change Intervals for
4000 Product Family Transmissions with High Capacity Filter
NOTE: Change fluid/filters at or before recommended mileage, months, or hours have elapsed, whichever occurs first.
NOTE: Local conditions, severity of operation or duty cycle may require more or less frequent fluid change intervals that differ
from the published recommended fluid change intervals of Allison Transmission. Allison Transmission recommends that the
customer use fluid analysis as the primary method for determining fluid change intervals. In the absence of a fluid analysis
program the fluid change intervals listed in the chart should be used.

SEVERE VOCATION* GENERAL VOCATION**

Filters Filters
Lube/
Fluid Main Internal
Auxiliary Fluid Main Internal Lube/Auxiliary
Schedule 1—Non-TES 295 Fluid
12,000 Miles 12,000 Miles 12,000 Miles 25,000 Miles 25,000 Miles 25,000 Miles
(20 000 km) (20 000 km) (20 000 km) (40 000 km) (40 000 km) (40 000 km)
Overhaul Overhaul
6 Months 6 Months 6 Months 12 Months 12 Months 12 Months

94
500 Hours 500 Hours 500 Hours 1000 Hours 1000 Hours 1000 Hours
Schedule 2—100 Percent TES 295 Fluid
2 Inch (1.75 Inch Approximately) and 4 Inch (3.5 Inch Approximately) Control Modules***
150,000 Miles 75,000 Miles 75,000 Miles 300,000 Miles 75,000 Miles 75,000 Miles
(240 000 km) (120 000 km) (120 000 km) (480 000 km) (120 000 km) (120 000 km)
Overhaul Overhaul
48 Months 36 Months 36 Months 48 Months 36 Months 36 Months
6000 Hours 3000 Hours 3000 Hours 6000 Hours 3000 Hours 3000 Hours
* Transmissions with retarders or on/off highway.
** Transmissions without retarders and on highway only.
*** 2 inch Control Module requires Filter Kit P/N 29545776; 4 inch Control Module requires Filter Kit P/N 29545779
ALLISON 4TH GENERATION MY09 PROGNOSTICS
ENABLED FLUID AND FILTER CHANGE INTERVAL
RECOMMENDATIONS
NOTE: This section is to be used for 3000 Product Family 3-, 4-, 5-,
and 6-speed transmissions only with MY09 Prognostics ENABLED.

CAUTION: Transmission fluid and filter change frequency is

determined by the severity of transmission service. To help avoid
transmission damage, more frequent changes may be necessary than
recommended in the general guidelines due to operating conditions and
duty cycle.

NOTE: Change fluid/filters at or before recommended mileage, months,

or hours have elapsed, whichever occurs first. For vehicles that average
less than 25 mph (40 kmh), operating hours represent a more reliable
measure of fluid life; therefore, fluid change intervals should not be
based on mileage only.

CAUTION: Transmission fluid and filters must be changed whenever

there is evidence of dirt or high temperature conditions. A high
temperature condition is indicated when the transmission fluid is
discolored, has a strong odor, or has exceeded oil analysis limits.

Fluid (OM) and filter (FM) Prognostics parameters provide indicators of required
maintenance actions. They are designed to maximize fluid and filter utilization.
Prognostics enabled requires the use of Allison approved TES 295
transmission fluids and Allison High Capacity Filters. If any other fluids or
filters are used, Prognostics must be DISABLED. Prognostics information will
not be accurate with any other transmission fluid or filter and could result in
missed maintenance activities resulting in transmission damage.
For new vehicles delivered from the OEM with a mixture of TES 295 and
Non-TES 295 fluid, Prognostics must be turned off and fluid/filter changes must
follow the recommendations in Table 7 and Table 8. If the customer fills the
transmission with Allison-approved TES 295 fluid, the change recommendations
of Allison-approved Non-TES 295 fluids MUST BE FOLLOWED. At the next
fluid change, if the customer fills with Allison-approved TES 295 fluid and uses
Allison High Capacity Filters, Prognostics can be “turned on”, if available, and
Table 9 recommendations may be followed.

95
 Table 9. Recommended Fluid/Filter Change Intervals for MY09 Prognostics Enabled
3000 and 4000 Product Families Transmissions
NOTE: This schedule is to be used with Prognostics “ON” beginning with the serial numbers listed in Service Tips #1099. Go
to www.allisontransmission.com and click SERVICE, Fluids, then Service Tips for the current revision.
NOTE: 100 percent concentration of TES 295 Allison approved fluids and Allison High Capacity Filters is REQUIRED. Less
than 100 percent concentration of TES 295 Allison approved fluids are considered a mixture and shall not be used with MY09
Prognostics or this change schedule. Utilization of previous Non-TES 295 Fluid/Filter Change Intervals tables is required.
NOTE: Fluid fill capacity is dependent on vehicle configuration. Final fluid capacity must be determined by dipstick level
(refer to Mechanic’s Tips, MT3004EN, Refill Transmission Section 2–8c, or Operator’s Manual, CARE AND MAINTENANCE
section).

General or Severe Vocation

Fluids–Prognostics ON* Filters–Prognostics ON*
Change fluid when indicated by controller or Main and Lube Change filters when indicated by controller
60 months (five years) whichever occurs first. between fluid changes or 60 months (five years)

96
Also change filters with fluid whichever occurs first.
Internal Overhaul only
* If Prognostics is turned OFF or not calibrated in the TCM after the serial numbers listed in Service Tips #1099, utilization of Table 7 or Table 8 fluid
change intervals is required.
FLUID ANALYSIS
Transmissions used in high cycle rate applications should use fluid analysis to
make sure fluid is changed as soon as needed. Transmission protection and fluid
change intervals may be optimized by monitoring fluid oxidation according to the
tests and limits shown in the fluid oxidation measurement limits table. Consult
your local telephone directory for fluid analysis firms. To be sure of consistent and
accurate fluid analysis, use only one fluid analysis firm. Refer to Technician’s
Guide for Automatic Transmission Fluid, GN2055EN, for additional information.

Fluid Oxidation Measurement Limits

Test Limit
Viscosity ±25 percent change from new fluid
Total Acid Number (TAN) +3.0* change from new fluid
Solids 2 percent by volume
* mg of potassium hydroxide (KOH) to neutralize a gram of fluid.

REFILL TRANSMISSION
The amount of refill fluid is less than the amount used for the initial fill. Fluid
remains in the external circuits and transmission cavities after draining the
transmission.
After refill, determine that the fluid level is correct using the FLUID LEVEL
CHECK USING PUSHBUTTON OR LEVER SHIFT SELECTOR section of this
manual.

NOTE: Quantities listed are approximations and do not include external

lines and cooler hose.

Transmission Fluid Capacity

Initial Fill Refill

Transmission Sump Liters Quarts Liters Quarts
3000 Product 4 inch 27 29 18 19
Family 2 inch 25 26 16 17
4000 Product 4 inch 48 51 40 42
Family* 2 inch 41 43 33 34
*
Subtract 2.8 Liters (3 Quarts) for transmissions without PTO.

97
 DIAGNOSTICS

DIAGNOSTIC CODES

R
MODE
N
D
R MODE
5
4
N 3
2
D 1

PC
WTEC lll ALLISON DOC™

1
2
MODE MODE
3
4
5
D
N
R

4th GENERATION MY09 PROGNOSTICS

V11063.00.00

Figure 15. Shift Selectors and Allison DOC™ For PC–Service Tool

98
Poor performance may activate a diagnostic code without illuminating the
CHECK TRANS light. Continued illumination of the CHECK TRANS light
during vehicle operation (not start-up) indicates the TCM/ECU has signaled a
diagnostic code. Up to five diagnostic codes may be recorded. Diagnostic codes
may be read and cancelled by the Allison DOC™ For PC–Service Tool or Allison
shift selectors shown in Figure 15. Code reading, clearing methods, and complete
code descriptions are available in the troubleshooting manual for your
transmission. Refer to the SERVICE LITERATURE section for the appropriate
publication. For more information on accessing and clearing codes refer to the
following paragraphs.
WTEC III Controls Diagnostic Code. To clear diagnostic codes using the
Allison shift selectors shown in Figure 15, refer to the code reading and clearing
methods described in WTEC III DIAGNOSTIC CODE DISPLAY PROCEDURE
in the DRIVING TIPS section.
Allison 4th Generation, MY09 Prognostics DISABLED, and Seven-Speed
Transmissions Diagnostic Codes. To clear diagnostic codes using the Allison
shift selectors shown in Figure 15, refer to the code reading and clearing methods
described in ALLISON 4TH GENERATION CONTROLS DIAGNOSTIC CODE
DISPLAY PROCEDURE in the DRIVING TIPS section.
Allison 4th Generation MY09 Prognostics Diagnostic Code. To clear diagnostic
codes using the Allison shift selectors shown in Figure 15, refer to the code
reading and clearing methods described in ALLISON 4TH GENERATION MY09
PROGNOSTICS DIAGNOSTIC CODE DISPLAY PROCEDURE in the
DRIVING TIPS section.

99
 CUSTOMER SERVICE

OWNER ASSISTANCE
The satisfaction and goodwill of the owners of Allison transmissions are of
primary concern to Allison Transmission, its distributors, and their dealers.
As an owner of an Allison transmission, you have service locations throughout the
world that are eager to meet your parts and service needs with:
• Expert service by trained personnel.
• Emergency service 24 hours a day in many areas.
• Complete parts support.
• Sales teams to help determine your transmission requirements.
• Product information and literature.
Normally, any situation that arises in connection with the sale, operation, or
service of your transmission will be handled by the distributor or dealer in your
area. Check the telephone directory for the Allison Transmission service outlet
nearest you or utilize Allison Transmission’s Sales and Service Locator tool on the
Allison Transmission web site at www.allisontransmission.com. You may also
refer to Allison Transmission’s Worldwide Sales and Service Directory
(SA2229EN).
We recognize, however, that despite the best intentions of everyone concerned,
misunderstandings may occur. To further assure your complete satisfaction, we
have developed the following three-step procedure to be followed in the event a
problem has not been handled satisfactorily.
Step One—Discuss your problem with a member of management from the
distributorship or dealership. Frequently, complaints are the result of a
breakdown in communication and can quickly be resolved by a member of
management. If you have already discussed the problem with the Sales or Service
Manager, contact the General Manager. All Allison Transmission dealers are
associated with an Allison Transmission distributor. If the problem originates with
a dealer, explain the matter to a management member of the distributorship with

100
whom the dealer has his service agreement. The dealer will provide his Allison
Transmission distributor’s name, address, and telephone number on request.
Step Two—When it appears the problem cannot be readily resolved at the
distributor level without additional assistance, contact the Allison Technical
Assistance Center at 800-252-5283. They will place you in contact with the
Regional Customer Support Manager for your area.
For prompt assistance, please have the following information available:
• Name and location of authorized distributor or dealer.
• Type and make of vehicle/equipment.
• Transmission model number, serial number, and assembly number (if
equipped with electronic controls, also provide the TCM assembly number).
• Transmission delivery date and accumulated miles and/or hours of
operation.
• Nature of problem.
• Chronological summary of your transmission’s history.
Step Three—If you are still not satisfied after contacting the Regional Customer
Support Manager, present the entire matter to the Home Office by writing to
the following address:
Allison Transmission
Manager, Warranty Administration
PO Box 894, Mail Code PF9
Indianapolis, IN 46206-0894
The inclusion of all pertinent information will assist the Home Office in
expediting the matter.
When contacting the Home Office, please keep in mind that ultimately the
problem will likely be resolved at the distributorship or dealership using their
facilities, equipment, and personnel. Therefore, it is suggested that Step One be
followed when experiencing a problem.
Your purchase of an Allison Transmission product is greatly appreciated, and it is
our sincere desire to assure complete satisfaction.

101
SERVICE LITERATURE
Additional service literature is available as shown in the service literature table.
This service literature provides fully illustrated instructions for the operation,
maintenance, service, overhaul, and parts support of your transmission. To be sure
that you get maximum performance and service life from your unit, you may
order publications from:
SGI, Inc.
Attn: Allison Literature Fulfillment Desk
8350 Allison Avenue
Indianapolis, IN 46268
TOLL FREE: 888-666-5799
INTERNATIONAL: 317-471-4995

Available Service Literature (WTEC III Controls)

Publication Type 3000 4000

Allison DOC™ For PC User Guide GN3433EN GN3433EN
Automatic Transmission Fluid GN2055EN GN2055EN
Technician’s Guide
Mechanic’s Tips* MT3004EN MT3004EN
Parts Catalog* PC2150EN PC2456EN
Parts Catalog CD-ROM CD2150EN CD2456EN
Principles of Operation PO2454EN PO2454EN
Service Manual SM2148EN SM2457EN
Troubleshooting Manual TS2973EN TS2973EN
Worldwide Sales and Service SA2229EN SA2229EN
Directory*
* Also available on the Allison Transmission web site at www.allisontransmission.com

102
 Available Service Literature (Allison 4th Generation Controls)

Publication Type 3000 4000

Allison DOC™ For PC User Guide GN3433EN GN3433EN
Mechanic’s Tips (except 3700 MT4015EN MT4015EN
7-speed)*
Mechanic’s Tips (7-speed)* MT4108EN NA
Parts Catalog* PC2150EN PC2456EN
Parts Catalog on CD CD2150EN CD2456EN
Principles of Operation PO4016EN PO4016EN
Service Manual SM4013EN SM4014EN
Troubleshooting Manual TS3989EN TS3989EN
Worldwide Sales and Service SA2229EN SA2229EN
Directory*
* Also available on the Allison Transmission web site at www.allisontransmission.com

103
ALLISON TRANSMISSION DISTRIBUTORS
EASTERN REGION
Atlantic Detroit Diesel-Allison, LLC Penn Detroit Diesel-Allison, LLC
190 Chapin Road 8330 State Road
Pine Brook, NJ 07058 Philadelphia, PA 19136-2986
973-575-0309 215-335-0500
Covington Power Services Western Branch Diesel, Inc.
8015 Piedmont Triad Parkway 3504 Shipwright Street
Greensboro, NC 27409 Portsmouth, VA 23703
336-292-9240 757-673-7000
Johnson & Towers, Inc. W.W. Williams S.E., Inc.
2021 Briggs Road 3077 Moreland Avenue
Mount Laurel, NJ 08054 Conley, GA 30288
856-234-6990 404-366-1070
New England Detroit Diesel-Allison, Inc.
90 Bay State Road
Wakefield, MA 01880-1095
781-246-1810

CENTRAL REGION
Central Power Systems & Services, Inc. Inland Power Group, Inc.
9200 Liberty Drive 13015 West Custer Avenue
Liberty, MO 64068 Butler, WI 53007-0916
816-781-8070 262-781-7100
Clarke Power Services, Inc. Interstate PowerSystems, Inc.
3133 East Kemper Road 2501 American Boulevard, East
Cincinnati, OH 45241 Minneapolis, MN 55425
513-771-2200 952-854-5511
Detroit Diesel-Allison Canada East W.W. Williams M.W., Inc.
Div. of Integrated Power Systems Corp. 1176 Industrial Parkway, North
2997 Avenue Watt Brunswick, OH 44212-2342
Quebec, Quebec G1X 3W1 330-225-7751
418-651-5371
Harper Power Products, Inc
10 Diesel Drive
Toronto, Ontario M8W 2T8
416-259-3281

104
 SOUTHERN REGION
Caribe Detroit Diesel-Allison Stewart & Stevenson Power Products, LLC
Division of GT Corporation 5170 East 58th Place
Ceramic Ind. Park Commerce City, CO 80022
Campo Rico Ave., Block C 303-287-7441
Carolina, Puerto Rico 00982
787-750-5000
Detroit Diesel-Allison de Mexico S.A. Stewart & Stevenson Power Products, LLC
de C.V. 1000 Louisiana, Suite 4950
Av. Santa Rosa No. 58 Houston, TX 77002
Col. Ampliacion Norte 713-751-2600
San Juan Ixtacala, Tlalnepantla
C.P. 54160, Estado de Mexico
525-5-5333-1800
Florida Detroit Diesel-Allison, Inc. United Engines, LLC
2277 N.W. 14th Street 5555 West Reno Street
Miami, FL 33125-0068 Oklahoma City, OK 73127
904-737-7330 405-947-3321

WESTERN REGION
ABC Transmissions, Ltd Valley Power Systems, Inc
9357 – 193rd Street 425 South Hacienda Boulevard
Surrey, British Columbia V4N 4E7 City of Industry, CA 91745-1123
604-888-1211 626-333-1243
Allison West Waterous Power Systems
14775 Wicks Boulevard (A Div. of Integrated Power Systems Corp.)
San Leandro, CA 94577–6779 10025 – 51 Avenue
510–351–6101 Edmonton, Alberta T6E OA8
780-437-3550
Pacific Power Products Company W.W. Williams S.W., Inc.
7215 South 228th Street 2602 S. 19th Avenue
Kent, WA 98032 Phoenix, AZ 85009
253-854-0505 602-257-0561
Smith Power Products, Inc.
3065 West California Avenue
Salt Lake City, UT 84104
801-415-5000

105
 Ask for the Allison

Ask your truck dealer for a complete listing of vehicle models

featuring Rugged Duty Series transmissions, or contact
your Authorized Allison Distributor.
For the representative close to you,
visit www.allisontransmission.com.

Information highway.
Visit www.allisontransmission.com
for a comprehensive library of
informational brochures, including
Mechanic’s Tips, Parts Catalogs,
Troubleshooting Manuals
and Service Manuals.

OM3752EN 200805 Printed in USA 200805