ISUZU TROOPER 1998 Service Repair Manual

MANUAL TRANSMISSION7B±3
(4JX1)
A07RW043

7B±4MANUAL TRANSMISSION
Diagnosis
ConditionPossible causeCorrection
Abnormal noiseFlywheel pilot bearing wornReplace
Bearings worn or broken (Mainshaft,
counter shaft, and transfer shaft)Replace
Gear tooth contact surfaces worn or
scuffed (Mainshaft, counter shaft,
reverse idler gear and transfer gears)Replace
Splines worn (Mainshaft,
synchronizer clutch hub)Replace
Gear or bearing thrust face seizedReplace
Lack of backlash between meshing
gearsReplace
Hard ShiftingImproper clutch pedal free playReadjust
Change lever sliding portions wornRepair or replace
Regrease
Shift block, shift rod and/or control
box sliding faces wornReplace
Shift arm and synchronizer sleeve
groove wornReplace worn parts
Thrust washer, collar, and/or gear
thrust faces worn (Mainshaft and
counter shaft thrust play)Replace worn parts
Synchronizer parts wornReplace
Walking or Jumping out of gearDetent ball wornReplace
Detent spring weakened or brokenReplace
Shift rod and/or control box sliding
faces wornReplace
Shift arm and synchronizer sleeve
groove wornReplace worn parts
Thrust washer, collar, and/or gear
thrust faces worn (Mainshaft and
counter shaft thrust play)Replace worn parts
Bearings worn or brokenReplace
Splines worn (Mainshaft,
synchronizer hub)Replace
Synchronizer spring weakened or
brokenReplace
Oil leakageLoose drain plug(s) and/or filler
plug(s)Tighten
Replenish oil
Defective or improperly installed
gasket(s)Replace
Oil seal worn or scratchedReplace

MANUAL TRANSMISSION7B±5
Manual Transmission Assembly
Transmission and Associated Parts
220RW108
Legend
(1) Gear Control Lever and Knob
(2) Transfer Control Lever and Knob
(3) Front Console Assembly
(4) Grommet Assembly
(5) Transfer Protector
(6) Rear Propeller Shaft
(7) Front Propeller Shaft
(8) Exhaust Pipe
(9) Backup Lamp, 4WD Indicator, and 1±2
Indicator Switch Harness Connector
(10) Speedometer Sensor and 2WD±4WD Actuator
Harness Connector(11) Slave Cylinder Heat Protector
(12) Harness Heat Protector
(13) Slave Cylinder
(14) Dust Cover
(15) Engine Rear Mount Nut
(16) Engine Rear Mount Bolt
(17) Engine Rear Mount
(18) Third Crossmember
(19) Flywheel Under Cover
(20) Transmission Retaining Bolt
(21) Transmission Assembly with Transfer Case

7B±6MANUAL TRANSMISSION
Removal
NOTE: Before remove the transmission and transfer
assembly from the vehicle, change the transfer mode to
2WD using push button on dash panel.
1. Remove engine hood.
2. Disconnect battery ground cable.
3. Remove the gear control lever knob.
4. Remove the front console assembly.
5. Remove the grommet assembly.
6. Remove the transmission control lever and transfer
control lever.
235RW014
7. Raise and support the vehicle with suitable jack
stand.
8. Remove transfer protector.
9. Remove the rear propeller shaft.
NOTE: Apply alignment marks on the flange at the both
front and rear side.
(4JX1)
401RW060
10. Remove the front propeller shaft.
NOTE: Apply alignment marks on the flange at both the
front and rear sides.
401RS003
11. Disconnect two oxygen sensor connectors from the
transmission harness (6VE1).
12. Remove the front and 3 way exhaust pipe (6VE1).
Remove the exhaust pipe with catalytic converter
(4JX1).
(4JX1)
150RW041

MANUAL TRANSMISSION7B±7
13. Disconnect the backup lamp switch, 4WD indicator
switch and 1±2 indicator switch harness connectors.
826RW023
14. Disconnect the speedometer sensor and 2WD-4WD
actuator harness connectors.
826RW024

7B±8MANUAL TRANSMISSION
15. Remove four fuel pipe bracket from the transmission
case (6VE1).
141RW024

MANUAL TRANSMISSION7B±9
16. Remove the slave cylinder heat protector.
17. Remove the harness heat protector (6VE1).
(6VE1)
225RW006
18. Remove two transmission harness clamps and
bracket (6VE1).
19. Remove the slave cylinder.
206RW002
20. Remove the two dust cover from transmission case.
21. Support the transfer case with a jack.22. Remove two engine rear mount nuts.
(6VE1)
022RT002
23. Remove third crossmember (6VE1).
24. Remove third crossmember with rear mount rubber
(4JX1).
(4JX1)
022RW013
25. Remove two engine rear mount bolts (6VE1).
26. Remove the rear mount from the transmission
(6VE1).
27. Remove three flywheel under cover (6VE1).

7B±10MANUAL TRANSMISSION
28. Support the transmission with a transmission jack
and then remove jack from the transfer case side.
220RS001
29. Use the clutch release bearing remover
5±8840±2291±0 (J±39207) to disconnect the clutch
release bearing from the clutch pressure plate.
220RW109
Release bearing disconnection
1. Pull the shift fork toward the transmission to press
the clutch release bearing against the clutch.
2. Insert the clutch release bearing remover
between the wedge collar and the release
bearing.3. Turn the remover to separate the release bearing.
NOTE: Be sure not to insert the remover between the
wedge collar and the clutch.
220RW063
220RW064

MANUAL TRANSMISSION7B±11
220RW119
Legend
(1) Pressure Plate Assembly
(2) Release Bearing
(3) Wedge Collar
30. Remove the transmission retaining nuts and bolts.
31. Remove the transmission assembly with transfer
case from the vehicle.
NOTE: Remove the transfer case from the transmission
assembly if the transmission disassembly required.
Refer to Transfer Case in Drive Line/Axle section.
Installation
1. Apply a thin coat of molybdenum disulfide grease to
the top gear shaft spline.
2. Slowly operate the transmission jack until the front of
transmission is aligned with the rear of the engine.
The slope of the engine and the transmission must be
the same.
3. Align the top gear shaft spline with the clutch driven
plate spline.
220RS005
4. Install the transmission to the engine.
Tighten the transmission retaining nuts and bolts.

7B±12MANUAL TRANSMISSION
(6VE1)
225RW019