Technical Service Information
CHRYSLER 62TE
MULTIPLE GEAR RATIO ERRORS
COMPLAINT: After Overhaul, Chrysler and Dodge vehicles equipped with the 62TE may exhibit gear ratio
errors and erratic shifts, accompanied with limp mode. The Diagnostic trouble codes include
P0731, P0732, P0733, P0734, P0735 and P0736 , which are gear ratio errors for all gears.
CAUSE: The cause may be, that during installation of the transmission, the Transfer shaft speed sensor
and the Output Speed sensor connectors were cross connected, as shown in Figure 2. Note
that the connectors for all three of the sensors are identical, it will be necessary to verify wire
color to ensure the right connector is connected to the right sensor. Another possibility may
be that during overhaul the Rear Planetary was replaced with one from a 41TE transmission.
See Figure 3 and note that the reluctor for the 62TE has 48 teeth and the 41TE has 24. This
will cause problems with ratio calculation by the PCM.
Description: The 62TE is equipped with three speed sensors and their locations are shown in
Figures 1 and 2.
With a total of three speed sensors, the 62TE can monitor three different ratios. One is the
ratio check of the Input Shaft Speed Sensor (Nt) versus the Output Shaft Speed Sensor (No).
This measures the overall transmission ratio.
A second ratio check is made between the Input Shaft Speed Sensor (Nt) and the Transfer
Shaft Speed Sensor (Nc), which checks the main transmission centerline ratio.
A third ratio check is made between the Transfer Shaft Speed Sensor (Nc) and the Output
Shaft Speed Sensor (No), which checks the underdrive centerline ratio. The control logic is
to continuously check the three ratios while in gear. Should any of the three ratios fall outside
of the programmed parameters, due to clutch slippage or clutch failure for a given period of
time, the transmission is intelligently put into 3rd gear failsafe.
CORRECTION: To correct this condition, refer to Figures 1 and 2 to ensure that the correct connectors are
connected to the correct sensors and ensure that the correct Rear Planetary has been installed,
as shown in Figure 3.
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 1 of 4
Technical Service Information
SPEED SENSOR LOCATIONS AND GEAR RATIOS
US
FOR E ONLY
DEAL
ER
Input Shaft
Speed Sensor
Gear Ratio
3
71
AA
TP
KT
K0
8
6
8
D2
6
1
0
3A
A
Reverse 3.215
71
69
51
P0
1st Gear 4.127
2nd Gear 2.842
3rd Gear 2.284
4th Prime 1.573
82610
P
713AA086
1.452
86163637
4th Gear
5th Gear 1.000
6th Gear 0.689
Transfer Shaft Output Shaft
Speed Sensor Speed Sensor
Copyright © 2013 ATSG
Figure 1
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 2 of 4
Technical Service Information
INPUT-OUTPUT AND TRANSFER SHAFT SPEED SENSOR DESCRIPTION
Input Shaft Speed Sensor (ISS) Output Shaft Speed Sensor (OSS)
The ISS is a two wire magnetic pickup device that The Output Speed Sensor (OSS) has been relocated to
generates AC signals as rotation of the input clutch the underdrive centerline side of the case, and reads
housing occurs. output shaft speed from the output planetary carrier
assembly. The OSS is a two wire magnetic pickup
device that generates AC signals as rotation of the
INPUT SHAFT SPEED SENSOR output planetary carrier occurs..
8.6
OUTPUT SHAFT SPEED SENSOR
8.6
554AA
554AA
Actual Resistance
1590 Ohms @ 72°F
Actual Resistance
1590 Ohms @ 72°F
Transfer Shaft Speed Sensor (TSS)
The TSS is a two wire magnetic pickup device that
generates AC signals as rotation of the rear planetary
carrier occurs.
SPEED SENSOR HARNESS CONNECTORS
INPUT TRANSFER OUTPUT
TRANSFER SHAFT SPEED SENSOR
8.6
Dk Green/Lt Green
Dk Green/Orange
Dk Green/Brown
Dk Green/Violet
Dk Green/Violet
Dk Green/Violet
930AA
1 2 1 2 1 2
Actual Resistance 1 = Speed Sensor Signal
1424 Ohms @ 72°F 2 = Speed Sensor Ground
Note: Wire colors shown are for 2009 Grand Caravan 3.8L.
Note: The Speed Sensor Harness connectors as shown above are identical.
It will be necessary to verify the correct location with a wire diagram with
wire color information
Figure 2 15-30
AUTOMATIC TRANSMISSION SERVICE GROUP Page 3 of 4
Technical Service Information
REAR PLANETARY
62TE 41TE (604)
48 Tooth 24 Tooth
Transfer Speed Output Speed
Reluctor Reluctor
These Planetary’s DO NOT interchange
Figure 3
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 4 of 4
