Description - Chrysler Vehicle User Manual

TJ
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 165
SHIFT MECHANISM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 165
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 165
DIAGNOSIS AND TESTING - SHIFT
MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . 165
ADJUSTMENTS - SHIFT MECHANISM
SOLENOID
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 166
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 167
SOLENOID/PRESSURE SWITCH ASSY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 167
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 167
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 169
TORQUE CONVERTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 169
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 172
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
AUTOMATIC TRANSMISSION -
42RLE

DESCRIPTION

The 42RLE (Fig. 1) is a four-speed transmission
that is a conventional hydraulic/mechanical assembly
controlled with adaptive electronic controls and mon-
itors. The hydraulic system of the transmission con-
sists of the transmission fluid, fluid passages,
hydraulic valves, and various line pressure control
components. An input clutch assembly which houses
the underdrive, overdrive, and reverse clutches is
used. It also utilizes separate holding clutches: 2nd/
4th gear and Low/Reverse. The primary mechanical
components of the transmission consist of the follow-
ing:
• Three multiple disc input clutches
• Two multiple disc holding clutches
• Four hydraulic accumulators
• Two planetary gear sets
• Hydraulic oil pump
AUTOMATIC TRANSMISSION - 42RLE
INSTALLATION
TRANSMISSION CONTROL RELAY
DESCRIPTION
OPERATION
TRANSMISSION RANGE SENSOR
DESCRIPTION
. . . . . . 166 OPERATION
REMOVAL
INSTALLATION
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION
OPERATION
VALVE BODY
DESCRIPTION
OPERATION
REMOVAL
DISASSEMBLY
ASSEMBLY
INSTALLATION
• Valve body
• Solenoid/Pressure switch assembly
Control of the transmission is accomplished by
fully adaptive electronics. Optimum shift scheduling
is accomplished through continuous real-time sensor
feedback information provided to the Powertrain
Control Module (PCM).
The PCM is the heart of the electronic control sys-
tem and relies on information from various direct
and indirect inputs (sensors, switches, etc.) to deter-
mine driver demand and vehicle operating condi-
tions. With this information, the PCM can calculate
and perform timely and quality shifts through vari-
ous output or control devices (solenoid pack, trans-
mission control relay, etc.).
The PCM also performs certain self-diagnostic
functions and provides comprehensive information
(sensor data, DTC's, etc.) which is helpful in proper
diagnosis and repair. This information can be viewed
with the DRB scan tool.
. . . . . . . . . . . . . . . . . . . . . . . . 174
. . . . . . . . . . . . . . . . . . . . . . . . 174
. . . . . . . . . . . . . . . . . . . . . . . . . . 174
. . . . . . . . . . . . . . . . . . . . . . . . 175
. . . . . . . . . . . . . . . . . . . . . . . . . . 175
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
. . . . . . . . . . . . . . . . . . . . . . . . 176
. . . . . . . . . . . . . . . . . . . . . . . . 176
. . . . . . . . . . . . . . . . . . . . . . . . . . 176
. . . . . . . . . . . . . . . . . . . . . . . . 177
. . . . . . . . . . . . . . . . . . . . . . . . . . 177
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
. . . . . . . . . . . . . . . . . . . . . . . . 182
. . . . . . . . . . . . . . . . . . . . . . . . . . . 188
. . . . . . . . . . . . . . . . . . . . . . . . 193
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