Toyota/Lexus U760E,

U66OE, U760F
U660F
ZIP KIT ®
®

PART NUMBER U660E-ZIP

U760E-ZIP IDENTIFICATION GUIDE

Valve Body Identification Guide

Identification
U760E U660E, U660F
Upper Valve Body Casting Upper Valve Body Casting

Small Exhaust Groove Extended Exhaust

Groove

No Transmission U660 Casting Number

Designation (may be seen here)

Solenoid Casting Solenoid Casting

Smaller Solenoid Larger Solenoid
Casting Boss Casting Boss

U660 Casting Number

No Casting Number

No Pressure
Switch Plate Pressure
Switch Plate
Casting Flat
Cutouts Casting

NOTE: Large canister solenoid connectors NOTE: Large canister solenoid connectors
are brown and white. are brown and black.

©2019
©2019 Sonnax
Sonnax Transmission
Transmission Company,
Company, Inc.
Inc. •• A
A Marmon / Berkshire Hathaway
Marmon / Berkshire Hathaway Company
Company U660E-ZIP-Identify 02-13-19
U760E-ZIP-Identify 02-13-19
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com
 Toyota/Lexus U760E, U760F
ZIP KIT ®
PART NUMBER U760E-ZIP QUICK GUIDE
Parts are labeled here in order of installation. See other side of sheet for details on kit contents.

installation Diagram
Middle Valve Body
U760E Shown

Solenoid modulator
valve balance port.

11 Solenoid modulator
valve balance orifice.
Drill with .062" bit. Insert
.062" aluminum plug into
orifice and peen shut.

2
1
9 10 4
8

Upper Valve Body

6 U760E Shown
3 8
5

In addition to general rebuilding tips and technical information, the technical booklet included in this kit contains vacuum
testing and additional repair options for higher mileage units or for repairing specific complaints which are beyond the
scope of this kit.

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Guide 02-13-19

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 Toyota/Lexus U760E, U760F ZIP KIT® Quick Guide

Kit Contents & Installation Steps

Step 1 Replace OE B1 Apply Step 7 R
 eplace OE (Short)
Boost Assembly C1 Accumulator Piston
Packaging Pocket 1 Packaging Pocket 7
• Sleeve • Valve • Accumulator Piston • O-Rings (2) 1 extra

Step 2 Replace OE Reverse Step 8 Replace OE (Long) B1, B2,

Boost Assembly B3 & C2 Accumulator Pistons
Packaging Pocket 2 Packaging Pocket 8
• Sleeve • Valve • Accumulator Pistons (4) • O-Rings (6) 2 extra

Step 3 Replace OE Small End Plugs Step 9 Replace OE Checkballs

CAUTION! O-rings go on inboard spool! Inboard retaining port NOTE: See pages 6 & 7 in installation and testing booklet for locations.
edge on casting should be chamfered prior to installation to
prevent O-ring shear. See page 8 of installation and testing Packaging Pocket 9
booklet for details. • Checkballs, .218" dia. (2)
Packaging Pocket 3
• End Plugs, Small (6) • O-Rings, Small (9) 3 extra
Step 10 R
 eplace OE O-Rings on
Case Connector
Step 4 Replace OE Solenoid NOTE: See page 8 in installation and testing booklet for locations.
Modulator Valve LineUp Packaging Pocket 10

CAUTION! Note location of OE retainer on tri-lobed OE end • Case Connector O-Ring, Large
plug, if applicable. See page 8 of installation and testing
booklet for assembly details.
Packaging Pocket 4
Step 11 D
 rill & Plug Separator
• Valve • Sleeve • Spring • End Plug • Shims (2)
Plate Balance Orifice at
Solenoid Modulator Valve
Step 5 Replace OE Lockup To prevent solenoid modulator leakage, drill indicated orifice to .062".
Plug with aluminum plug and peen in place.
Control Boost Assembly Packaging Pocket 11
Packaging Pocket 5 • Orifice Plugs, .062" dia. (2) 1 extra
• Sleeve • Valve • Drill Bit, .062" dia.

Step 6 Replace OE Large End Plug

CAUTION! O-ring for this large
end plug goes on outboard spool!

Packaging Pocket 6
• End Plug, Large • O-Rings, Large (2) 1 extra

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Guide 02-13-19

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 2
 Toyota/Lexus U760E, U760F
ZIP KIT ®
PART NUMBER U760E-ZIP INSTALLATION & TESTING BOOKLET

TCM Initialized/Memory Reset

The U760E and U760F TCM learns the performance of the vehicle and adapts the transmission accordingly. When significant transmission
or engine repairs are made, the TCM needs to be initialized and/or have the memory reset in accordance with the chart in Figure 2. These
procedures require use of Toyota’s Techstream scan tool or their PC-based version of the scan tool, Techstream lite. This TCM was eliminated
on 2012-later models; there is now a pass-through connector that links the transmission connector to the PCM, which also controls the engine.

Figure 1 Automatic Transaxle Parts Replacement Chart Figure 2

Transaxle
Memory
Replaced Parts Compensation Road Test
(Learned Values)
Code
Automatic Transaxle
Input Reset
Assembly
Valve Body Assembly Initialize Necessary Reset
Shift Solenoid Valve
Necessary
SL1 and/or SL2
Shift Solenoid Valve
Initialize Necessary Reset
SL3 and/or SL4
QR Code Label
Input
with Transaxle TCM* - Possible
(into the new TCM)
TCM/ECU Compensation
Code TCM* - Impossible Necessary
Location
* Note: If possible, read the transaxle compensation code from the previous TCM.

Input Transaxle Compensation Code 5. Enter the menu items in the following order:
The transaxle compensation code is a unique, 60-digit alphanu- Powertrain / ECT / Utility / A/T Code Reset
meric value found on the QR label at the top of the transmission 6. Press “Next” again to proceed.
(Figure 1). Inputting an incorrect code into the TCM may cause 7. Press “Exit.”
shift shock.
1. Shift the shift lever to Neutral or Park.
Road Test
1. Warm up the engine.
2. Connect Techstream to the DLC3 (diagnostic link connector).
2. From a standstill, achieve highest possible speed with the
3. Turn ignition switch on (do not start the engine).
accelerator pedal opened no more than 15%. Keep the
4. Turn tester on. accelerator pedal angle steady while driving the vehicle.
5. Enter the menu items in the following order: 3. Repeat the previous step until shift shock no longer occurs.
Powertrain / ECT / Utility / A/T Code Registration.
4. From a standstill, achieve highest possible speed with the
6. Select “Set Compensation Code.” accelerator pedal opened 25% or more. Keep the accelerator
7. Register the compensation code: pedal angle steady while driving the vehicle.
a. Press “Input” 5. Repeat the previous step until shift shock no longer occurs.
b. Type in code. Press “OK.”
8. Verify the displayed value is the same as that on the QR label. Memory Reset
9. Press “Next” to set the code to the TCM. This procedure resets the TCM memory so it can memorize new
performance information.
Initialize Transaxle Compensation Code 1. Turn the ignition switch off.
This procedure resets the code and, combined with a road test, 2. Connect the Techstream to the DLC3.
allows the TCM to relearn.
3. Turn the ignition switch on.
1. Shift the shift lever to Neutral or Park. 4. Turn Techstream main switch on.
2. Turn the ignition switch off. 5. Enter the menu items in the following order:
3. Connect Techstrean to the DLC3. Powertrain / ECT / Utility / Reset Memory.
4. Turn ignition switch on and push Techstream main switch on. 6. Press “Next” to confirm reset.
©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Booklet 02-13-19
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 1
 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

Figure 3
Solenoid Energized
Clutch & Brake Application When selector position in manually operated.

Selector Position C1 C2 B1 B2 B3 F1 SL1 SL2 SL3 SL4 SLU SLT SL

P-Park X X
R-Reverse X X X X
N-Neutral X X
D, S6-1st X X X X
D, S6-2nd X X X X X
D, S6-3rd X X X X X
D, S6-4th X X X X X
D, S6-5th X X X X X
D, S6-6th X X X X X
S1-1st/Manual X X X

Zip Kit Instructions Removal Bolts

Bolt Color Bolt
1. Valve Body Removal Code Length
a. With valve body still in transmission, remove 11 indicated bolts (Figure 4).
A Red 25mm
b. Remove case connector and internal wire harness assembly from transmission
B Green 30mm
as part of the valve body.
C Blue 35mm
2. Valve Body Disassembly D Yellow 45mm
a. Disconnect and remove counter gear/turbine speed sensor and valve body
Torque all to 8 ft-lb
bolts (Figure 5).
b. Disconnect case connector from all seven solenoids. Remove case connector
assembly retaining bolt, bracket and connector/harness assembly (Figure 6). Case connector and internal Figure 4
c. Remove eight indicated bolts (Figure 8), solenoid brackets, solenoids, small wire harness assembly.
and large cover plate. D
B A
d. Remove remaining eight bolts (Figure 9).

3. Installation
Install Zip Kit parts as shown on diagram of separate quick guide sheet included in C 
B
this Zip Kit.

NOTE: Special rebuilding tips for steps 3, 4 and 10 are on page 8 of this booklet.

Sonnax recommends vacuum testing critical wear areas not covered by this kit to B A A A A
determine whether additional Sonnax parts are required (see pages 4–5).  B

4. Valve Body Reassembly

a. Reinstall eight indicated bolts (Figure 9).
b. Reinstall solenoid brackets, solenoids, small and large cover plate and eight e. When reinstalling valve body, first temporarily
bolts (Figure 8). tighten the two bolts marked () in Figure 4 as
c. Reinstall case connector assembly retaining bracket, bolt and connector/harness they are positioning bolts.
assembly (Figure 6). Attach wire harness from bracket and connect to all seven
solenoids.
d. Connect and reinstall counter gear/turbine speed sensor and valve body bolts
(Figure 5).

02-13-19 U760E-ZIP-Booklet ©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company

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 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

Connector/Harness Disassembly &

Figure 5 Figure 6
Assembly Reassembly Bolts
Release Bolt Color Bolt
Code Length
A A Green 16mm
F B Purple 35.5mm
A C C Yellow 50mm
A
D Dk Blue 60mm
E
C
E Orange 70mm
F Teal 75mm
G Brown 80mm
Disconnect Turbine Speed Sensor
Torque all to 8 ft-lb

SL3 Solenoid SL1 Solenoid SL2 Solenoid SLU Solenoid Figure 7

(PCSC) (PCSA) (PCSB) TCC & B2 Brake
B1 Brake C1 Clutch C2 Clutch 5.0–5.6 ohm
5.0–5.6 ohm 5.0–5.6 ohm 5.0–5.6 ohm (White &
Black Wires) SLT Solenoid
(Blue & (Red & (Orange &
SL4 Solenoid Black Wires) Black Wires) Line Pressure
Black Wires)
(PCSD) 5.0–5.6 ohm
B3 Brake (Grey &
Black Wires)
5.0–5.6 ohm
(Green &
Black Wires)
SL Solenoid
• Lockup Relay Valve
• B2 Brake Clutch
Apply Control Valve
G G • Reverse Sequence
G
Valve
G 11–15 ohm
(1 Blue Wire)

CAUTION! Do not interchange solenoids. If SLU and

SLT are interchanged, this will cause both line and TCC
All solenoid resistance values at 20oC/68oF. apply issues. SLT has five slots, SLU has four slots.

Figure 8 Figure 9

C C
D
C
A
G
B G
E
G G

C
C C
A

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Booklet 02-13-19

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 3
 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

Critical Wear Areas & Vacuum Test Locations

NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow.
Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts noted for replacement.

Upper Valve Body • U760E Shown B2 Accumulator Piston

• Burnt B2 brake clutches • Burnt clutches
B1 Accumulator Piston • Flare/Harsh shifts
• Burnt B1 brake clutches • Forward Slip • Delayed Reverse with harsh engagement
• Flare/Harsh shifts • Burnt clutches Replace with Sonnax Part No. 47740-11K* C1 Accumulator Piston
Replace with Sonnax Part No. • Delayed Forward • Forwad slip
47740-11K*
• C1 Clutch burned • Harsh Forward
• Flare shifts
Replace with Sonnax Part No.
B3 Accumulator Piston 47740-12K*
• Burnt B3 brake clutches
• Flare/Harsh shifts • Burnt clutches
• Delayed Reverse with harsh engagement C2 Accumulator Piston
Replace with Sonnax Part No. • Burnt C2 brake clutches • Forward Slip
47740-11K* • Flare/Harsh shifts • Burnt clutches
Replace with Sonnax Part No.


47740-11K*
Secondary Pressure
Regulator Valve
• TCC codes • TCC shudder
• TCC apply & release concerns Test: Test this port with valve blocked
• Bearing/Bushing failure • Lube failures inboard .125" with OE retainer.
Replace with Sonnax Part No.
47740-26K Requires F-47740-TL26 & VB-FIX

Reverse Sequence Valve

• Delayed Reverse • Low Reverse pressure
• Burnt B2 or B3 brake

Lockup Relay Valve

 

Test: Test this port with valve blocked

• Converter apply/release concerns outboard .125" with OE retainer and
sealing port on back with thumb.
• Converter codes; P0741
• Overheated transmission

Lockup Control Boost

Assembly Test: Test each port with valve blocked
outboard .125" with OE retainer.
• TCC apply & release concerns
• TCC slip codes • Overheated transmission
Replace with Sonnax Part No.
47740-06K*

End Plugs
Lockup Control Valve • Burnt brake clutches • Shift concerns
• Burnt brake clutches • Shift concerns • Lockup concerns • Burnt clutches
• Lockup concerns • Burnt clutches Replace with Sonnax Part No.
Replace with Sonnax Part No. 47740-21K* 
47740-30K Requires F-47740-TL30 & VB-FIX NOTE: Several Locations = 

*Items with an asterisk (*) are included in this Zip Kit.

02-13-19 U760E-ZIP-Booklet ©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company
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 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

15
20 10
25 5
30 0
VACUUM
TEST For specific vacuum test information, refer to individual part instructions included in kits and available at www.sonnax.com.

Middle Valve Body – Lower Side, U760E Shown B1 Apply Boost Assembly
• 1-2 & 5-6 Flare • Gear ratio codes
B1 Apply Control Valve • B1 brake clutches burned • Bind-up
• No Manual 1st • 2nd & 6th Slip
• 1-2 Long slide • Low line pressure
• Clutch failure • B1 brake clutches burned Replace with Sonnax Part No.
47740-40K*
Replace with Sonnax Part No. Test: Block this port and
47740-44K Requires F-47740-TL44 & VB-FIX port on back when testing.

Primary Pressure Regulator Valve Test: Test this port with valve
blocked inboard .218" dia. checkball.
• Erratic/Soft/Harsh shifts • Low line pressure/rise
• Clutch slippage • High line pressure in Reverse
• High line pressure • Burnt clutches
• Burnt brake clutches Note: Seal
Clutch Control Valve
• 4-5 Flare/Harsh

 
• Low converter pressure port on back
when testing. • Delayed Neutral to Drive
Replace with Sonnax Part No.
47740-02K Requires F-47740-TL2 & VB-FIX • Delayed Reverse
Replace with Sonnax Part No.
47740-22K
Sequence Valve Requires F-47740-TL22 & VB-FIX

• Shift concerns • Burnt clutches/brakes

C2 Clutch Apply
B2 Apply Control Valve Control Valve
• B2 Clutch burned • Slipping 4th, 5th, 6th
• Delayed Reverse Note: Seal port on • Burnt C2 clutch
• No Reverse back when testing.**

• Reverse slip
Test: Test this port and port on back
Replace with Sonnax Part No. when testing B2 apply control valve.**
47740-27K Requires F-47740-TL27 & VB-FIX

B2 Control Valve Middle Valve Body –

• Delayed/Harsh Reverse Back Side, U760E Shown
• Double bump Reverse engagement
• No Manual 1st
• B2 Brake clutches burned
Note: Seal when
Replace with Sonnax Part No. testing B1 apply
47740-35K Requires F-47740-TL35 & VB-FIX control valve.

Note: Seal when

Solenoid Modulator Valve Note: Seal when testing pressure
testing B1 apply regulator valve.
• Shift concerns
boost assembly.
• Solenoid performance codes
• TCC apply & release concerns
Replace with Sonnax Part No. Reverse Boost Assembly
47740-25K Requires F-47740-TL24 & VB-FIX • Delayed Reverse • Reverse slip
• Low line rise in Reverse • No Reverse
• B2 Brake clutches burned Note: Seal when
** T
 hese two passages are connected. testing B2 apply
The mat will provide the seal for the • UD/B3 Brake clutches burned
control valve.**
middle valve body, upper side. The • Low Reverse boost • B4 Clutch burned
passage indicated (**) will also need Replace with Sonnax Part No.
to be sealed to vacuum test the circuit. 47740-38K*

*Items with an asterisk (*) are included in this Zip Kit.

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Booklet 02-13-19
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 5
 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

OE Exploded View
Upper Valve Body • U760E Shown
NOTE: Depending upon vehicle application, the OE springs shown may not be present.

Upper Valve Body Descriptions

I.D. No. Description

Lockup Control Valve (inboard)
101
Lockup Control Boost Assembly (outboard)
102 Lockup Relay Valve
103 Reverse Sequence Valve
104 Secondary Pressure Regulator Valve
108
105 B3 Accumulator Piston
106 B1 Accumulator Piston
107 B2 Accumulator Piston 107
108 C1 Accumulator Piston 106
109 C2 Accumulator Piston
110 Lube Relief Check Valve
111 Converter Relief Check Valve

Plastic Check Valve

109

105

104

.218" Dia. Checkball

.393" Dia. Checkballs

103

102

101

110
111

02-13-19 U760E-ZIP-Booklet ©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company

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 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

.393" Dia. Middle Valve Body • U760E Shown

Checkballs

Filter
201

Line Pressure 202

Blow-Off
Check Valve
& Spring
203
.218" Dia.
Checkball
204
.393" Dia. Checkballs

205
Filter
206

207

208

209

Middle Valve Body Descriptions

I.D. No. Description

B1 Apply Control Valve (inboard)
201
B1 Apply Boost Assembly (outboard)
Primary Pressure Regulator Valve (inboard)
202
Reverse Boost Assembly (outboard)
203 Sequence Valve
204 Clutch Control Valve
205 C2 Clutch Apply Control Valve
B2 Apply Control Relay Valve (inboard)
206
B2 Apply Control Valve (outboard)
B2 Control Valve (inboard)
207
B2 Control Relay Valve (outboard)
208 Manual Valve
209 Solenoid Modulator Valve

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U760E-ZIP-Booklet 02-13-19

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 7
 Toyota/Lexus U760E, U760F ZIP KIT® Installation & Testing Booklet

Additional Technical Tips for Installation Steps 3, 4 & 10

from the Quick Guide
Step 3 Replace OE Small
Narrow Bore Length Large Outer Chamfer Figure 10
End Plugs
The large outer chamfer on the small end plug bores
makes the outer bore too narrow for an O-ring to
seal properly. Sonnax O-ringed end plugs require the
O-ring to seal at the bore inboard of the retainer port.
To prevent O-ring shear during assembly, the sharp
edge must be broken. This can be done by inserting
Retainer Port
a narrow file or small screwdriver through the retainer
Sharp Edge port and reworking the edge (Figure 10).
Modified Edge
To install O-ringed end plug after the edge has been
End Plug Location Modified End Plug Location
modified, place O-ring in the narrow plug groove.
Lubricate plug and O-ring with O-Lube and roll on
bench to size. Carefully push plug into the bore. As
Figure 11 O-ring contacts the modified edge, gently compress
exposed portion with a small screwdriver blade inserted
through retainer port.
Retainer C. 2 Shims B. 1 Shim

Step 4 Replace OE Solenoid

Modulator Valve Lineup
During disassembly of OE solenoid modulator
lineup, note location of the tri-lobed end plug
(if applicable) retainer (Figure 11). This adjusts
solenoid modulator pressure. Follow options A-D if a
A. No Shims
tri-lobed end plug is used.
OE Solenoid Modulator Lineup OE Tri-Lobed End Plug
If a standard two-spooled end plug is used, proceed to
option E.
Sonnax
Selective Shims
Figure 12 Option A: If OE retainer is installed at the most narrow
location, no Sonnax shims are required.
Option B: 
If OE retainer is installed at the middle
Sonnax Solenoid Modulator Valve Kit
spool location, one Sonnax shim is required.
Option C: If OE retainer is installed at the widest spool
location, two Sonnax shims are required.
Figure 13
Option D: 
Shims should be placed over valve spring
stem, between valve spool face and spring
(Figure 12).
Option E: For standard two-spooled OE plug, do not
use any shims. Install as pictured (Figure 12),
omitting the shims.
NOTE: Sonnax end plug can be swapped end for end for
best fit of sleeve in bore.

Replace with
Sonnax Large Case Connector
Step 10 Replace OE O-Ring on
O-Ring & Internal Wire Case Connector
Harness Assembly
Replace O-ring in the case connector and internal wire harness
assembly (Figure 13).

02-13-19 U760E-ZIP-Booklet ©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company

Page 8 800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com