Dodge 2001 Ram 1500 Owner's Manual page 1941

21 - 306 AUTOMATIC TRANSMISSION - 44RE
OVERRUNNING CLUTCH CAM/OVERDRIVE
PISTON RETAINER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 405
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 405
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
PARK/NEUTRAL POSITION SWITCH
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 408
PARK/NEUTRAL POSITION SWITCH . . . . . . . 408
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 408
PISTONS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 408
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
PLANETARY GEARTRAIN/OUTPUT SHAFT
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 410
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 410
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . 411
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
REAR CLUTCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 417
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 418
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
REAR SERVO
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 421
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 421
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 421
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
SHIFT MECHANISM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 422
AUTOMATIC TRANSMISSION -
44RE
DESCRIPTION
The 44RE is a four speed fully automatic transmis-
sion (Fig. 1) with an electronic governor. The 44RE 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
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 423
SOLENOID
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 423
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
SPEED SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 424
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
THROTTLE VALVE CABLE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 424
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 425
TORQUE CONVERTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 427
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 430
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 432
TORQUE CONVERTER DRAINBACK VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 432
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 432
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 432
TORQUE CONVERTER DRAINBACK VALVE . 432
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 433
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 433
VALVE BODY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 433
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 438
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 453
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 475
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 476
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.
BR/BE