Jeep Grand Cherokee WK. Manual — part 1402
INSTALLATION
1. Clean seal bore of the oil pump of any residue or
particles from the original seal.
2. Install new oil seal in the oil pump housing using
Seal Installer C-3860-A (1).
SENSOR-OUTPUT SPEED
DESCRIPTION
The Input and Output Speed Sensors are two-wire magnetic pickup devices that generate AC signals as rotation
occurs. They are mounted in the left side of the transmission case and are considered primary inputs to the Trans-
mission Control Module (TCM).
OPERATION
The Input Speed Sensor provides information on how fast the input shaft is rotating. As the teeth of the input clutch
hub pass by the sensor coil, an AC voltage is generated and sent to the TCM. The TCM interprets this information
as input shaft rpm.
The Output Speed Sensor generates an AC signal in a similar fashion, though its coil is excited by rotation of the
rear planetary carrier lugs. The TCM interprets this information as output shaft rpm.
The TCM compares the input and output speed signals to determine the following:
•
Transmission gear ratio
•
Speed ratio error detection
•
CVI calculation
The TCM also compares the input speed signal and the engine speed signal to determine the following:
•
Torque converter clutch slippage
•
Torque converter element speed ratio
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AUTOMATIC TRANSMISSION - 545RFE - SERVICE INFORMATION
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REMOVAL
1. Raise vehicle.
2. Place a suitable fluid catch pan under the transmis-
sion.
3. Remove the wiring connector from the output
speed sensor (1).
4. Remove the bolt holding the output speed sensor
(1) to the transmission case.
5. Remove the output speed sensor (1) from the
transmission case.
INSTALLATION
1. Install the output speed sensor (1) into the trans-
mission case.
2. Install the bolt to hold the output speed sensor (1)
into the transmission case. Tighten the bolt to 11.9
N·m (105 in.lbs.).
3. Install the wiring connector onto the output speed
sensor (1).
4. Verify the transmission fluid level. Add fluid as nec-
essary.
5. Lower vehicle.
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AUTOMATIC TRANSMISSION - 545RFE - SERVICE INFORMATION
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CABLE-PARK LOCK
REMOVAL
1. Place ignition key in the ACC (2) position.
2. Remove the lower instrument panel trim as neces-
sary to access the park lock cable.
3. Disconnect park lock cable (4) from ignition cylin-
der (3).
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AUTOMATIC TRANSMISSION - 545RFE - SERVICE INFORMATION
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4. Remove the floor console as necessary for access
to the park lock cable. (Refer to 23 - BODY/INTE-
RIOR/FLOOR CONSOLE - REMOVAL)
5. If necessary, remove the bolts holding the shield,
covering the gearshift and park lock cables, to the
shifter assembly and remove the shield.
6. Disconnect the park lock cable (5) from the shift
mechanism. Release retention tab using suitable
screwdriver.
INSTALLATION
1. Verify that ignition key is in ACC (2) position.
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AUTOMATIC TRANSMISSION - 545RFE - SERVICE INFORMATION
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