Input Speed Sensor Description; Operation; Removal; Installation - Chrysler Vehicle User Manual

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INPUT SPEED SENSOR
DESCRIPTION
The Input and Output Speed Sensors (Fig. 223) 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).
Fig. 223 Input and Output Speed Sensors and
Transmission Range Sensor
1 - INPUT SPEED SENSOR
2 - OUTPUT SPEED SENSOR
3 - TRANSMISSION RANGE SENSOR

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 rota-
tion 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
transmission.
AUTOMATIC TRANSMISSION - 42RLE
(3) Remove the wiring connector from the input
speed sensor (Fig. 224).
(4) Remove the bolt holding the input speed sensor
to the transmission case.
(5) Remove the input speed sensor from the trans-
mission case.
Fig. 224 Input Speed Sensor
1 - INPUT SPEED SENSOR
2 - OUTPUT SPEED SENSOR
3 - TRANSMISSION RANGE SENSOR

INSTALLATION

(1) Install the input speed sensor into the trans-
mission case.
(2) Install the bolt to hold the input speed sensor
into the transmission case. Tighten the bolt to 9 N·m
(80 in.lbs.).
(3) Install the wiring connector onto the input
speed sensor
(4) Verify the transmission fluid level. Add fluid as
necessary.
(5) Lower vehicle.
OIL PUMP
DESCRIPTION
The oil pump is located in the pump housing inside
the bell housing of the transmission case. The oil
pump assembly (Fig. 225) consists of an inner and
outer gear, a housing, and a cover that also serves as
the reaction shaft support.
OPERATION
As the torque converter rotates, the converter hub
rotates the inner and outer gears. As the gears
rotate, the clearance
increases in the crescent area, and creates a suction
at the inlet side of the pump. This suction draws
fluid through the pump inlet from the oil pan. As the
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between the gear teeth