Dodge 2001 Ram 1500 Owner's Manual page 1770

BR/BE
OVERRUNNING CLUTCH CAM/OVERDRIVE
PISTON RETAINER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 235
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 235
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
PARK/NEUTRAL POSITION SWITCH
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 237
PARK/NEUTRAL POSITION SWITCH . . . . . . . 237
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 238
PISTONS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 238
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
PLANETARY GEARTRAIN/OUTPUT SHAFT
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 240
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 240
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
REAR CLUTCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 246
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 247
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
REAR SERVO
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 250
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 251
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
SHIFT MECHANISM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 251
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 252
SOLENOID
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 252
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
SPEED SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 253
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
THROTTLE VALVE CABLE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 253
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 254
TORQUE CONVERTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 256
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 261
TORQUE CONVERTER DRAINBACK VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 262
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 262
TORQUE CONVERTER DRAINBACK VALVE . 262
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 262
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
VALVE BODY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 263
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 282
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 303
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 304
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.
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