Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Durango 1998-2000 Approved Dodge Durango 1998-99 98DN_21
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DN TRANSMISSION 21 - 1
TRANSMISSION
CONTENTS
page page
42/44RE AUTOMATIC TRANSMISSION . . . . . . . . 1 NV231 TRANSFER CASE . . . . . . . . . . . . . . . . . 235
46RE AUTOMATIC TRANSMISSION . . . . . . . . . 116 NV242 TRANSFER CASE . . . . . . . . . . . . . . . . . 259
42/44RE AUTOMATIC TRANSMISSION
INDEX
page page
GENERAL INFORMATION ROAD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . 9
42/44 RE TRANSMISSION . . . . . . . . . . . . . . . . . . 2 STALL TEST ANALYSIS . . . . . . . . . . . . . . . . . . . 13
CAUSES OF BURNT FLUID . . . . . . . . . . . . . . . . . 4 THROTTLE VALVE CABLE . . . . . . . . . . . . . . . . . . 9
EFFECTS OF INCORRECT FLUID LEVEL . . . . . . 4 SERVICE PROCEDURES
ELECTRONIC LOCK-UP TORQUE ALUMINUM THREAD REPAIR . . . . . . . . . . . . . . 26
CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . 5 CONVERTER DRAINBACK CHECK VALVE
FLUID CONTAMINATION . . . . . . . . . . . . . . . . . . . 4 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
GEARSHIFT MECHANISM . . . . . . . . . . . . . . . . . . 5 FLUID AND FILTER REPLACEMENT . . . . . . . . . 24
RECOMMENDED FLUID . . . . . . . . . . . . . . . . . . . 4 FLUID LEVEL CHECK . . . . . . . . . . . . . . . . . . . . 23
TRANSMISSION GEAR RATIOS . . . . . . . . . . . . . . 5 FLUSHING COOLERS AND TUBES . . . . . . . . . . 25
TRANSMISSION IDENTIFICATION . . . . . . . . . . . . 4 OIL PUMP VOLUME CHECK . . . . . . . . . . . . . . . 25
DESCRIPTION AND OPERATION TRANSMISSION FILL PROCEDURE . . . . . . . . . . 24
3-4 SHIFT SEQUENCE . . . . . . . . . . . . . . . . . . . . . 7 REMOVAL AND INSTALLATION
CONVERTER CLUTCH ENGAGEMENT . . . . . . . . 8 GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . 29
CONVERTER DRAINBACK VALVE . . . . . . . . . . . . 8 GOVERNOR SOLENOID AND PRESSURE
ELECTRONIC GOVERNOR . . . . . . . . . . . . . . . . . 5 SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
GOVERNOR PRESSURE CURVES . . . . . . . . . . . 6 OUTPUT SHAFT FRONT BEARING . . . . . . . . . . 35
HYDRAULIC CONTROL SYSTEM . . . . . . . . . . . . . 7 OUTPUT SHAFT REAR BEARING . . . . . . . . . . . 35
OVERDRIVE OFF SWITCH . . . . . . . . . . . . . . . . . 7 OVERDRIVE HOUSING BUSHING . . . . . . . . . . . 34
QUICK FILL VALVE . . . . . . . . . . . . . . . . . . . . . . . 8 OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . 33
SHIFT VALVE OPERATION . . . . . . . . . . . . . . . . . . 7 PARK/NEUTRAL POSITION SWITCH . . . . . . . . . 29
DIAGNOSIS AND TESTING TORQUE CONVERTER . . . . . . . . . . . . . . . . . . . 28
AIR TESTING TRANSMISSION CLUTCH AND TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . 26
BAND OPERATION . . . . . . . . . . . . . . . . . . . . . 14 VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
ANALYZING ROAD TEST . . . . . . . . . . . . . . . . . . 10 YOKE SEAL REPLACEMENT . . . . . . . . . . . . . . . 29
AUTOMATIC TRANSMISSION DIAGNOSIS . . . . . . 8 DISASSEMBLY AND ASSEMBLY
CONVERTER HOUSING FLUID LEAK FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . 66
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 FRONT SERVO PISTON . . . . . . . . . . . . . . . . . . 62
CONVERTER STALL TEST . . . . . . . . . . . . . . . . . 13 OIL PUMP AND REACTION SHAFT SUPPORT . . 63
DIAGNOSIS TABLES AND CHARTS--RE OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . 75
TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . 15 OVERRUNNING CLUTCH CAM/OVERDRIVE
GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . . 9 PISTON RETAINER . . . . . . . . . . . . . . . . . . . . . 61
HYDRAULIC PRESSURE TEST . . . . . . . . . . . . . 10 PLANETARY GEARTRAIN/OUTPUT SHAFT . . . . 70
OVERDRIVE ELECTRICAL CONTROLS . . . . . . . . 9 REAR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . 68
PARK/NEUTRAL POSITION SWITCH . . . . . . . . . . 9 REAR SERVO PISTON . . . . . . . . . . . . . . . . . . . . 63
PRELIMINARY DIAGNOSIS . . . . . . . . . . . . . . . . . 8 TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . 50
21 - 2 TRANSMISSION DN
VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
CLEANING AND INSPECTION ADJUSTMENTS
ACCUMULATOR. . . . . . . . . . . . . . . . . . . . . . . . . . 91 BAND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . 95
FRONT CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . 92 GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . . . . 95
FRONT SERVO . . . . . . . . . . . . . . . . . . . . . . . . . . 91 TRANSMISSION THROTTLE VALVE CABLE
OIL PUMP AND REACTION SHAFT SUPPORT. . . 92 ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . 94
OVERDRIVE UNIT . . . . . . . . . . . . . . . . . . . . . . . . 93 VALVE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
OVERRUNNING CLUTCH/LOW-REVERSE SCHEMATICS AND DIAGRAMS
DRUM/OVERDRIVE PISTON RETAINER . . . . . . 91 HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . . 98
PLANETARY GEARTRAIN . . . . . . . . . . . . . . . . . . 93 SPECIFICATIONS
REAR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . 92 TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . 110
REAR SERVO . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 SPECIAL TOOLS
TRANSMISSION. . . . . . . . . . . . . . . . . . . . . . . . . . 91 RE TRANSMISSIONS . . . . . . . . . . . . . . . . . . . . . 112
GENERAL INFORMATION clutch is controlled by the Powertrain Control Mod-
ule (PCM). The torque converter clutch is hydrauli-
42/44 RE TRANSMISSION cally applied and is released when fluid is vented
The 42/44RE is a four speed fully automatic trans- from the hydraulic circuit by the torque converter
mission (Fig. 1) with an electronic governor. First control (TCC) solenoid on the valve body. The torque
through third gear ranges are provided by the converter clutch engages in fourth gear, and in third
clutches, bands, overrunning clutch, and planetary gear when the O/D switch is OFF. Engagement
gear sets in the transmission. Fourth gear range is occurs when the vehicle is moving at a steady speed
provided by the overdrive unit that contains an over- after the vehicle has warmed up. The torque con-
drive clutch, direct clutch, planetary gear set, and verter clutch disengages when the accelerator is
overrunning clutch. The overdrive clutch is applied in applied. The 42/44 RE transmission is cooled by an
fourth gear only. The direct clutch is applied in all integral fluid cooler inside the radiator.
ranges except fourth gear. The torque converter
DN TRANSMISSION 21 - 3
GENERAL INFORMATION (Continued)
Fig. 1 42/44 RE Transmission
21 - 4 TRANSMISSION DN
GENERAL INFORMATION (Continued)
TRANSMISSION IDENTIFICATION (2) Heavy duty operation with a vehicle not prop-
Transmission identification numbers are stamped erly equipped for this type of operation. Trailer tow-
on the left side of the case just above the oil pan gas- ing or similar high load operation will overheat the
ket surface (Fig. 2). Refer to this information when transmission fluid if the vehicle is improperly
ordering replacement parts. equipped. Such vehicles should have an auxiliary
transmission fluid cooler, a heavy duty cooling sys-
tem, and the engine/axle ratio combination needed to
handle heavy loads.
FLUID CONTAMINATION
Transmission fluid contamination is generally a
result of:
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