Jeep Liberty KJ. Manual — part 1087
4. Remove Solenoid/Pressure Switch Assembly (1)
and screen from valve body (2).
INSTALLATION
NOTE: If the Solenoid/Pressure Switch assembly is being replaced, the Quick Learn Procedure must be per-
formed. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE
- STANDARD PROCEDURE)
1. Install Solenoid/Pressure Switch Assembly (1) and
screen (3) to the separator and transfer plates.
2. Install and tighten retaining screws (2) to 5.5 N·m
(50 in. lbs.) torque.
3. Install valve body. (Refer to 21 - TRANSMISSION/
AUTOMATIC - 42RLE/VALVE BODY - INSTALLA-
TION)
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AUTOMATIC TRANSMISSION - 42RLE
KJ
TORQUE CONVERTER
DESCRIPTION
The torque converter is a hydraulic device that cou-
ples the engine crankshaft to the transmission. The
torque converter consists of an outer shell with an
internal turbine (1), a stator (4), an overrunning clutch,
an impeller (2) and an electronically applied converter
clutch (6). The converter clutch provides reduced
engine
speed
and
greater
fuel
economy
when
engaged. Clutch engagement also provides reduced
transmission fluid temperatures. The torque converter
hub drives the transmission oil (fluid) pump.
The torque converter is a sealed, welded unit that is
not repairable and is serviced as an assembly.
CAUTION: The torque converter must be replaced
if a transmission failure resulted in large amounts
of metal or fiber contamination in the fluid.
IMPELLER
KJ
AUTOMATIC TRANSMISSION - 42RLE
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The impeller is an integral part of the converter housing. The impeller consists of curved blades placed radially
along the inside of the housing on the transmission side of the converter. As the converter housing is rotated by the
engine, so is the impeller, because they are one and the same and are the driving members of the system.
TURBINE
The turbine is the output, or driven, member of the converter. The turbine is mounted within the housing opposite
the impeller, but is not attached to the housing. The input shaft is inserted through the center of the impeller and
splined into the turbine. The design of the turbine is similar to the impeller, except the blades of the turbine are
curved in the opposite direction.
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AUTOMATIC TRANSMISSION - 42RLE
KJ
STATOR
The stator assembly is mounted on a stationary shaft
which is an integral part of the oil pump. The stator (1)
is located between the impeller (2) and the turbine (4)
within the torque converter case.
The stator contains an over-running clutch (1-4), which
allows the stator to rotate only in a clockwise direction.
When the stator is locked against the over-running
clutch, the torque multiplication feature of the torque
converter is operational.
KJ
AUTOMATIC TRANSMISSION - 42RLE
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