TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . . 69
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
CLEANING AND INSPECTION
ACCUMULATOR . . . . . . . . . . . . . . . . . . . . . . . . . 114
FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . 115
FRONT SERVO . . . . . . . . . . . . . . . . . . . . . . . . . 114
OIL PUMP AND REACTION SHAFT SUPPORT . . 115
OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . 116
OVERRUNNING CLUTCH/LOW-REVERSE
DRUM/OVERDRIVE PISTON RETAINER . . . . . 114
PLANETARY GEARTRAIN . . . . . . . . . . . . . . . . . 116
REAR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . 116
REAR SERVO . . . . . . . . . . . . . . . . . . . . . . . . . . 114
TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . 113
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
ADJUSTMENTS
BAND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . 120
BRAKE TRANSMISSION SHIFT INTERLOCK . . . 117
GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . 119
TRANSMISSION THROTTLE VALVE CABLE
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 117
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
SCHEMATICS AND DIAGRAMS
HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . 122
SPECIFICATIONS
TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . 135
SPECIAL TOOLS
RE TRANSMISSIONS . . . . . . . . . . . . . . . . . . . . . 136
DESCRIPTION AND OPERATION
44 RE TRANSMISSION
Vehicles equipped with the 3.1L turbo diesel engine
use the 44RE automatic transmission.
The 44RE is a four speed fully automatic transmis-
sion (Fig. 1) with an electronic governor. First
through third gear ranges are provided by the
clutches, bands, overrunning clutch, and planetary
gear sets in the transmission. Fourth gear range is
provided by the overdrive unit that contains an over-
drive clutch, direct clutch, planetary gear set, and
overrunning clutch. The overdrive clutch is applied in
fourth gear only. The direct clutch is applied in all
ranges except fourth gear. The torque converter
clutch is controlled by the Powertrain Control Mod-
ule (PCM). The torque converter clutch is hydrauli-
cally applied and is released when fluid is vented
from the hydraulic circuit by the torque converter
control (TCC) solenoid on the valve body. The torque
converter clutch engages in fourth gear, and in third
gear when the O/D switch is OFF. Engagement
occurs when the vehicle is moving at a steady speed
after the vehicle has warmed up. The torque con-
verter clutch disengages when the accelerator is
applied. The 44 RE transmission is cooled by an inte-
gral fluid cooler inside the radiator.
21 - 2
TRANSMISSION AND TRANSFER CASE
WJ
2000 JEEP GRAND CHEROKEE