Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Durango 1998-2000 Approved Dodge Durango 2000 00dn_21
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DN TRANSMISSION AND TRANSFER CASE 21 - 1
TRANSMISSION AND TRANSFER CASE
TABLE OF CONTENTS
page page
42/44RE AUTOMATIC TRANSMISSION . . . . . . . . . 1 NV231 TRANSFER CASE . . . . . . . . . . . . . . . . . . 416
46RE AUTOMATIC TRANSMISSION . . . . . . . . . . 161 NV242 TRANSFER CASE . . . . . . . . . . . . . . . . . . 443
45RFE AUTOMATIC TRANSMISSION . . . . . . . . . 330
42/44RE AUTOMATIC TRANSMISSION
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION CONVERTER HOUSING FLUID LEAK
42/44 RE TRANSMISSION . . . . . . . . . . . . . . . . . . . 2 DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
FLUID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DIAGNOSIS TABLES AND CHARTS--RE
TORQUE CONVERTER . . . . . . . . . . . . . . . . . . . . . 9 TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . 51
OIL PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SERVICE PROCEDURES
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 FLUID LEVEL CHECK . . . . . . . . . . . . . . . . . . . . . 60
ACCUMULATOR. . . . . . . . . . . . . . . . . . . . . . . . . . 31 FLUID AND FILTER REPLACEMENT . . . . . . . . . . 60
PISTONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 TRANSMISSION FILL PROCEDURE. . . . . . . . . . . 61
FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . 34 CONVERTER DRAINBACK CHECK VALVE
REAR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . 35 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
OVERDRIVE CLUTCH . . . . . . . . . . . . . . . . . . . . . 37 OIL PUMP VOLUME CHECK . . . . . . . . . . . . . . . . 62
OVERRUNNING CLUTCH . . . . . . . . . . . . . . . . . . 37 FLUSHING COOLERS AND TUBES . . . . . . . . . . . 62
PLANETARY GEARSET . . . . . . . . . . . . . . . . . . . . 38 ALUMINUM THREAD REPAIR . . . . . . . . . . . . . . . 63
BANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 REMOVAL AND INSTALLATION
SERVOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . . 63
GEARSHIFT MECHANISM . . . . . . . . . . . . . . . . . . 40 TORQUE CONVERTER . . . . . . . . . . . . . . . . . . . . 65
CONVERTER DRAINBACK VALVE . . . . . . . . . . . . 40 YOKE SEAL REPLACEMENT . . . . . . . . . . . . . . . . 66
POWERTRAIN CONTROL MODULE (PCM) . . . . . 40 PARK/NEUTRAL POSITION SWITCH . . . . . . . . . . 66
ELECTRONIC GOVERNOR . . . . . . . . . . . . . . . . . 41 GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . . 66
GOVERNOR PRESSURE CURVES . . . . . . . . . . . 43 GOVERNOR SOLENOID AND PRESSURE
OVERDRIVE OFF SWITCH . . . . . . . . . . . . . . . . . 44 SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
DIAGNOSIS AND TESTING VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
AUTOMATIC TRANSMISSION DIAGNOSIS. . . . . . 44 OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . . 70
EFFECTS OF INCORRECT FLUID LEVEL . . . . . . 44 OVERDRIVE HOUSING BUSHING . . . . . . . . . . . . 72
CAUSES OF BURNT FLUID . . . . . . . . . . . . . . . . . 44 OUTPUT SHAFT REAR BEARING . . . . . . . . . . . . 72
FLUID CONTAMINATION . . . . . . . . . . . . . . . . . . . 44 OUTPUT SHAFT FRONT BEARING . . . . . . . . . . . 73
PRELIMINARY DIAGNOSIS . . . . . . . . . . . . . . . . . 45 DISASSEMBLY AND ASSEMBLY
PARK/NEUTRAL POSITION SWITCH . . . . . . . . . . 45 VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
OVERDRIVE ELECTRICAL CONTROLS . . . . . . . . 45 TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . . 92
GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . . 45 OVERRUNNING CLUTCH CAM/OVERDRIVE
ROAD TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . 46 PISTON RETAINER . . . . . . . . . . . . . . . . . . . . . 102
ANALYZING ROAD TEST . . . . . . . . . . . . . . . . . . . 46 FRONT SERVO PISTON . . . . . . . . . . . . . . . . . . 105
HYDRAULIC PRESSURE TEST . . . . . . . . . . . . . . 46 REAR SERVO PISTON. . . . . . . . . . . . . . . . . . . . 105
AIR TESTING TRANSMISSION CLUTCH AND OIL PUMP AND REACTION SHAFT SUPPORT. . 105
BAND OPERATION . . . . . . . . . . . . . . . . . . . . . . 49 FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . 109
21 - 2 42/44RE AUTOMATIC TRANSMISSION DN
REAR CLUTCH. . . . . . . . . . . . . . . . . . . . . . . . . . 111 PLANETARY GEARTRAIN . . . . . . . . . . . . . . . . . 139
PLANETARY GEARTRAIN/OUTPUT SHAFT . . . . 114 OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . 140
OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . 119 ADJUSTMENTS
CLEANING AND INSPECTION TRANSMISSION THROTTLE VALVE CABLE
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . 140
TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . 137 GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . 141
OVERRUNNING CLUTCH/LOW-REVERSE BAND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . 141
DRUM/OVERDRIVE PISTON RETAINER . . . . . 137 VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
ACCUMULATOR. . . . . . . . . . . . . . . . . . . . . . . . . 137 SCHEMATICS AND DIAGRAMS
FRONT SERVO . . . . . . . . . . . . . . . . . . . . . . . . . 138 HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . 143
REAR SERVO . . . . . . . . . . . . . . . . . . . . . . . . . . 138 SPECIFICATIONS
OIL PUMP AND REACTION SHAFT SUPPORT. . 138 TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . 156
FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . 138 SPECIAL TOOLS
REAR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . 139 RE TRANSMISSIONS. . . . . . . . . . . . . . . . . . . . . 157
DESCRIPTION AND OPERATION running clutch and overdrive clutch, serve as the
holding components. The driving and holding compo-
42/44 RE TRANSMISSION nents combine to select the necessary planetary gear
components, in the front, rear, or overdrive planetary
DESCRIPTION gear set, transfer the engine power from the input
The 42/44RE is a four speed fully automatic trans- shaft through to the output shaft.
mission (Fig. 1) with an electronic governor. The The valve body is mounted to the lower side of the
42/44RE is equipped with a lock-up clutch in the transmission and contains the valves to control pres-
torque converter. First through third gear ranges are sure regulation, fluid flow control, and clutch/band
provided by the clutches, bands, overrunning clutch, application. The oil pump is mounted at the front of
and planetary gear sets in the transmission. Fourth the transmission and is driven by the torque con-
gear range is provided by the overdrive unit that con- verter hub. The pump supplies the oil pressure nec-
tains an overdrive clutch, direct clutch, planetary essary for clutch/band actuation and transmission
gear set, and overrunning clutch. lubrication.
The transmission contains a front, rear, and direct The 42/44RE transmission is cooled by an integral
clutch which function as the input driving compo- fluid cooler inside the radiator.
nents. They also contain the kickdown (front) and the
low/reverse (rear) bands which, along with the over-
DN 42/44RE AUTOMATIC TRANSMISSION 21 - 3
DESCRIPTION AND OPERATION (Continued)
Fig. 1 42/44RE Transmission
21 - 4 42/44RE AUTOMATIC TRANSMISSION DN
DESCRIPTION AND OPERATION (Continued)
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