Automatic Transmission - 42Re; Description - Dodge Dakota Sport 2001 Service Manual

AN
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 181
OVERRUNNING CLUTCH CAM/OVERDRIVE
PISTON RETAINER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 182
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 182
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
PISTONS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 185
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
PLANETARY GEARTRAIN/OUTPUT SHAFT
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 186
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 187
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
REAR CLUTCH

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 193

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 194
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
REAR SERVO
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 197
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 197
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
SHIFT MECHANISM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 198
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
SOLENOID
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 199
AUTOMATIC TRANSMISSION -
42RE
DESCRIPTION
The 42RE is a four speed fully automatic transmis-
sion (Fig. 1) with an electronic governor. The 42RE is
equipped with a lock-up clutch in the torque con-
verter. First through third gear ranges are provided
by the clutches, bands, overrunning clutch, and plan-
etary gear sets in the transmission. Fourth gear
range is provided by the overdrive unit that contains
an overdrive clutch, direct clutch, planetary gear set,
and overrunning clutch.
The transmission contains a front, rear, and direct
clutch which function as the input driving compo-
nents. It also contains the kickdown (front) and the

AUTOMATIC TRANSMISSION - 42RE

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
SPEED SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 199
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
THROTTLE VALVE CABLE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 200
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 200
TORQUE CONVERTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 202
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 207
TORQUE CONVERTER DRAINBACK VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 208
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 208
TORQUE CONVERTER DRAINBACK VALVE . 208
TRANSMISSION RANGE SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 208
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 210
TRANSMISSION RANGE SENSOR (TRS) . . . . 210
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 212
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 213
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
VALVE BODY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 213
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 233
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 253
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 254
low/reverse (rear) bands which, along with the over-
running clutch and overdrive clutch, serve as the
holding components. The driving and holding compo-
nents combine to select the necessary planetary gear
components, in the front, rear, or overdrive planetary
gear set, transfer the engine power from the input
shaft through to the output shaft.
The valve body is mounted to the lower side of the
transmission and contains the valves to control pres-
sure regulation, fluid flow control, and clutch/band
application. The oil pump is mounted at the front of
the transmission and is driven by the torque con-
verter hub. The pump supplies the oil pressure nec-
essary for clutch/band actuation and transmission
lubrication.
21 - 79