Dodge Durango (HB). Manual — part 1229
INSTALLATION
1. Install the TRS (2) to the manual shaft. Make sure
TRS locating pin rests in manual valve bore slot.
2. Install the TRS/manual shaft retaining screw (1)
and torque to 5 N·m (45 in. lbs.) torque.
3. Install the manual shaft seal (1).
4. Install valve body to the transmission. (Refer to 21
- TRANSMISSION//AUTOMATIC - 42RLE/VALVE
BODY - INSTALLATION)
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
21 - 321
SENSOR-TRANSMISSION TEMPERATURE
DESCRIPTION
The transmission temperature sensor (2) is located in
the transmission range sensor (1) and communicates
transmission sump temperature to the TCM.
OPERATION
The transmission range sensor (TRS) has an integrated thermistor that the TCM uses to monitor the transmission’s
sump temperature. Since fluid temperature can affect transmission shift quality and convertor lock up, the TCM
requires this information to determine which shift schedule to operate in. The TCM also monitors this temperature
data so it can energize the vehicle cooling fan(s) when a transmission “overheat” condition exists. If the thermistor
circuit fails, the TCM will revert to calculated oil temperature usage.
CALCULATED TEMPERATURE
A failure in the temperature sensor or circuit will result in calculated temperature being substituted for actual tem-
perature. Calculated temperature is a predicted fluid temperature which is calculated from a combination of inputs:
•
Battery (ambient) temperature
•
Engine coolant temperature
•
In-gear run time since start-up
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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BODY-VALVE
DESCRIPTION
The valve body assembly consists of a cast aluminum
valve body (5),separator plate (4), and transfer plate
(3). The valve body contains valves and check balls
that control fluid delivery to the torque converter
clutch, solenoid/pressure switch assembly, and fric-
tional clutches.
Also mounted to the valve body assembly are the
solenoid/pressure switch assembly and the transmis-
sion range sensor (2).
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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The valves contained within the valve body (1) include the following :
•
Regulator valve(2)
•
Solenoid switch valve(7)
•
Manual valve(5)
•
Converter clutch switch valve(6)
•
Converter clutch control valve(4)
•
Torque converter regulator valve(2)
•
Low/Reverse switch valve(3)
In addition, the valve body also contains the thermal valve, #2, 3, 4 & 5 check balls and the 2/4 accumulator
assembly.
OPERATION
NOTE: (Refer to 21 - TRANSMISSION/AUTOMATIC - 42RLE - SCHEMATICS AND DIAGRAMS) for a visual aid
in determining valve location, operation and design.
Valve Body - Exploded
1 - VALVE BODY
2 - T/C REGULATOR VALVE
3 - L/R SWITCH VALVE
4 - CONVERTER CLUTCH CONTROL VALVE
5 - MANUAL VALVE
6 - CONVERTER CLUTCH SWITCH VALVE
7 - SOLENOID SWITCH VALVE
8 - REGULATOR VALVE
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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