Dodge Dakota (R1). Manual — part 642
(7) Remove the TRS mounting bracket (Fig. 255)
from the transmission case.
INSTALLATION
(1) Move the transmission manual shaft lever to
the manual LOW position.
(2) Install the TRS mounting bracket into the
transmission case. Using Adapter 8581 (Fig. 256),
tighten the mounting bracket to 34 N·m (300 in.lbs.).
(3) Install the TRS (Fig. 257) into the mounting
bracket with the wiring connector facing the front of
the transmission.
(4) Install the two screws to hold the TRS to the
mounting bracket. Tighten the screws to 3.4 N·m (30
in.lbs.).
(5) Verify proper sensor operation (Fig. 258).
(6) Move the transmission manual shaft lever to
the PARK position.
(7) Connect TRS wiring connector to the TRS and
lower vehicle.
(8) Refill the transmission fluid to the correct
level.
Fig. 255 Remove TRS Mounting Bracket
1 - SOLENOID CASE CONNECTOR
2 - TRS MOUNTING BRACKET
Fig. 256 Tighten the TRS Mounting Bracket
1 - SOLENOID CASE CONNECTOR
2 - TRS MOUNTING BRACKET
3 - ADAPTER 8581
Fig. 257 Remove Transmission Range Sensor
1 - SOLENOID CASE CONNECTOR
2 - TRS MOUNTING BRACKET
3 - TRANSMISSION RANGE SENSOR
Fig. 258 Transmission Range Sensor Operation
1 - NEUTRAL CONTACT
2 - MANUAL LEVER AND SENSOR PLUNGER IN REVERSE
POSITION
3 - PARK CONTACT
4 - TRANSMISSION RANGE SENSOR
21 - 212
AUTOMATIC TRANSMISSION - 42RE
AN
TRANSMISSION RANGE SENSOR (Continued)
TRANSMISSION
TEMPERATURE SENSOR
DESCRIPTION
Transmission fluid temperature readings are sup-
plied to the transmission control module by the ther-
mistor (Fig. 259). The temperature readings are used
to control engagement of the fourth gear overdrive
clutch, the converter clutch, and governor pressure.
Normal resistance value for the thermistor at room
temperature is approximately 1000 ohms.
The thermistor is part of the governor pressure
sensor assembly and is immersed in transmission
fluid at all times.
OPERATION
The PCM prevents engagement of the converter
clutch and overdrive clutch, when fluid temperature
is below approximately 10°C (50°F).
If fluid temperature exceeds 126°C (260°F), the
PCM causes a 4-3 downshift and engage the con-
verter clutch. Engagement is according to the third
gear converter clutch engagement schedule.
The overdrive OFF lamp in the instrument panel
illuminates when the shift back to third occurs. The
transmission will not allow fourth gear operation
until fluid temperature decreases to approximately
110°C (230°F).
VALVE BODY
DESCRIPTION
The valve body consists of a cast aluminum valve
body, a separator plate, and transfer plate. The valve
body contains valves and check balls that control
fluid delivery to the torque converter clutch, bands,
and frictional clutches. The valve body contains the
following components (Fig. 260), (Fig. 261), (Fig.
262), and (Fig. 263):
• Regulator valve
• Regulator valve throttle pressure plug
• Line pressure plug and sleeve
• Kickdown valve
• Kickdown limit valve
• 1-2 shift valve
• 1-2 control valve
• 2-3 shift valve
• 2-3 governor plug
• 3-4 shift valve
• 3-4 timing valve
• 3-4 quick fill valve
• 3-4 accumulator
• Throttle valve
• Throttle pressure plug
• Switch valve
• Manual valve
• Converter clutch lock-up valve
• Converter clutch lock-up timing Valve
• Shuttle valve
• Shuttle valve throttle plug
• Boost Valve
• 10 check balls
By adjusting the spring pressure acting on the reg-
ulator valve, transmission line pressure can be
adjusted.
Fig. 259 Governor Pressure Sensor
1 - GOVERNOR BODY
2 - GOVERNOR PRESSURE SENSOR/TRANSMISSION FLUID
TEMPERATURE THERMISTOR
AN
AUTOMATIC TRANSMISSION - 42RE
21 - 213
Fig. 260 Upper Housing Control Valve Locations
1 - UPPER HOUSING
8 - MANUAL VALVE
2 - REGULATOR VALVE
9 - 1-2 GOVERNOR PLUG
3 - SWITCH VALVE
10 - GOVERNOR PLUG COVER
4 - REGULATOR VALVE SPRING
11 - THROTTLE PLUG
5 - KICKDOWN VALVE
12 - 2-3 GOVERNOR PLUG
6 - KICKDOWN DETENT
13 - SHUTTLE VALVE PRIMARY SPRING
7 - THROTTLE VALVE AND SPRING
21 - 214
AUTOMATIC TRANSMISSION - 42RE
AN
VALVE BODY (Continued)
Fig. 261 Shuttle and Boost Valve Locations
1 - SPRING
8 - SHUTTLE VALVE COVER
2 - RETAINER
9 - SHUTTLE VALVE
3 - BOOST VALVE
10 - SHUTTLE VALVE PRIMARY SPRING
4 - BOOST VALVE PLUG
11 - GOVERNOR PLUG COVER
5 - SPRING GUIDES
12 - THROTTLE PLUG
6 - E-CLIP
13 - UPPER HOUSING
7 - SHUTTLE VALVE SECONDARY SPRING
14 - BOOST VALVE COVER
AN
AUTOMATIC TRANSMISSION - 42RE
21 - 215
VALVE BODY (Continued)
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