Jeep Liberty KJ. Manual — part 1083
OUTPUT SPEED SENSOR
DESCRIPTION
The Input (1) and Output (2) 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 Transmission 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
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 (2).
NOTE: The speed sensor bolt has a sealing patch
applied from the factory. Be sure to reuse the
same bolt.
4. Remove the bolt holding the output speed sensor
to the transmission case.
5. Remove the output speed sensor (2) from the
transmission case.
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INSTALLATION
1. Install the output speed sensor (2) into the trans-
mission case.
NOTE: Before installing the speed sensor bolt, it
will be necessary to replenish the sealing patch on
the bolt using MOPAR
T
Lock & Seal Adhesive.
2. Install the bolt to hold the output speed sensor into
the transmission case. Tighten the bolt to 9 N·m
(80 in.lbs.).
3. Install the wiring connector onto the output speed
sensor
4. Verify the transmission fluid level. Add fluid as nec-
essary.
5. Lower vehicle.
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OVERDRIVE SWITCH
DESCRIPTION
The overdrive OFF (control) switch is located in the shifter handle. The switch is a momentary contact device that
signals the PCM to toggle current status of the overdrive function.
OPERATION
At key-on, fourth gear operation is allowed. Pressing the switch once causes the overdrive OFF mode to be entered
and the overdrive OFF switch lamp to be illuminated. Pressing the switch a second time causes normal overdrive
operation to be restored and the overdrive lamp to be turned off. The overdrive OFF mode defaults to ON after the
ignition switch is cycled OFF and ON. The normal position for the control switch is the ON position. The switch must
be in this position to energize the solenoids and allow upshifts to fourth gear. The control switch indicator light illu-
minates only when the overdrive switch is turned to the OFF position, or when illuminated by the transmission con-
trol module.
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PARK INTERLOCK CABLE
REMOVAL
1. Lower the steering column.
2. With the ignition switch in the “RUN” position
depress the park-interlock cable locking tab (2),
located on top of the cable connector at the steer-
ing column and pull the cable straight out.
3. Remove the park-interlock cable from steering col-
umn.
4. Remove the floor console and related trim. (Refer
to 23 - BODY/INTERIOR/FLOOR CONSOLE -
REMOVAL)
5. Disconnect the park-interlock cable (3) from the
shift lever assembly and remove the cable from the
shifter assembly bracket.
6. Release the park-interlock cable from any remain-
ing clips.
7. Remove park-interlock cable from the vehicle.
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