PLANETARY GEARTRAIN
DESCRIPTION ........................101
OPERATION ..........................101
DISASSEMBLY ........................101
ASSEMBLY ...........................101
SHIFT MECHANISM
DESCRIPTION ........................104
OPERATION ..........................104
REMOVAL ............................105
INSTALLATION ........................107
SOLENOID
DESCRIPTION ........................107
OPERATION ..........................109
TEMPERATURE SENSOR/PARK-NEUTRAL
CONTACT
DESCRIPTION
DESCRIPTION - PARK/NEUTRAL CONTACT . 111
DESCRIPTION .......................112
OPERATION
OPERATION ........................112
OPERATION ........................112
TORQUE CONVERTER
DESCRIPTION ........................113
OPERATION ..........................116
REMOVAL ............................118
INSTALLATION ........................118
TRANSFER CASE - NV247
REMOVAL ............................118
DISASSEMBLY ........................119
INSPECTION .........................126
ASSEMBLY ...........................128
INSTALLATION ........................136
SPECIFICATIONS
TRANSFER CASE - NV247 .............137
SPECIAL TOOLS
TRANSFER CASE - NV247 .............138
AUTOMATIC TRANSMISSION -
W5J400
DESCRIPTION
The W5J400 automatic transmission (Fig. 1) is an
electronically controlled 5-speed transmission with a
lock-up clutch in the torque converter. The ratios for
the gear stages are obtained by 3 planetary gear sets.
Fifth gear is designed as an overdrive with a high-
speed ratio.
The gears are actuated electronically/hydraulically.
The gears are shifted by means of an appropriate
combination of three multi-disc holding clutches,
three multi-disc driving clutches, and two freewheel-
ing clutches.
Electronic transmission control enables precise
adaptation of pressures to the respective operating
conditions and to the engine output during the shift
phase which results in a significant improvement in
shift quality.
Furthermore, it offers the advantage of a flexible
adaptation to various vehicle and engines.
Basically, the automatic transmission with elec-
tronic control offers the following advantages:
• Reduces fuel consumption.
• Improved shift comfort.
• More favourable step-up through the five gears.
• Increased service life and reliability.
• Lower maintenance costs.
TRANSMISSION IDENTIFICATION
The transmission name, W5J400, can be decoded
to describe the transmission as follows:
• W = A transmission using a hydraulic torque
converter.
• 5 = 5 forward gears.
• J = A transmission first used in a Jeept vehicle.
• 400 = A 4X4 transmission.
The transmission can be generically identified
visually by the presence of a round 13-way connector
located near the front corner of the transmission oil
pan, on the right side. Specific transmission informa-
tion can be found stamped into a pad on the left side
of the transmission, above the oil pan rail.
TRANSMISSION GEAR RATIOS
The gear ratios for the W5J400 automatic trans-
mission are as follows:
1st Gear .............................3.59:1
2nd Gear ............................2.19:1
3rd Gear .............................1.41:1
4th Gear .............................1.00:1
5th Gear .............................0.83:1
Reverse ..............................3.16:1
Reverse (In 4WD Low range) .............1.93:1
TRANSMISSION HOUSING
The converter housing and transmission are made
from a light alloy. These are bolted together and cen-
tered via the outer multi-disc carrier of multi-disc
holding clutch, B1. A coated intermediate plate pro-
vides the sealing. The oil pump and the outer multi-
disc carrier of the multi-disc holding clutch, B1, are
bolted to the converter housing. The stator shaft is
pressed into it and prevented from rotating by
splines. The electrohydraulic unit is bolted to the
transmission housing from underneath. A sheet
metal steel oil pan forms the closure.
MECHANICAL SECTION
The mechanical section consists of a drive shaft,
output shaft, a sun gear shaft, and three planetary
21a - 2 TRANSMISSION AND TRANSFER CASE WG
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