Transmission ISUZU TROOPER 1998 Service Owner's Manual

SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN 2A – 83
Tighten the steering wheel fixing nut to the specified
torque.
Steering wheel Nut Torque N·m (kg·m/lb·ft)
34 (3.5 / 25)
3. Steering lower cover
Install the engine hood opening lever.
2. Lower cluster assembly
1. Front console assembly
Connect the wiring harness connectors.
Install the transmission (for M/T) and transfer control
lever knob.

2A – 84 SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN
These steps are based on the LHD model.
REMOVAL
1. Front console assembly
Disconnect the transmission (for M/T) and transfer
control lever knob.
Disconnect the wiring harness connectors.
2. Lower cluster assembly
STEERING COLUMN REPLACEMENT
Removal Steps
1. Front console assembly
2. Lower cluster assembly
3. Steering lower cover
4. Steering wheel
5. Steering column cover
6. Combination switch
7. Snap ring
8. Cushion rubber
9. Shift lock cable (for A/T)
10. Lock cylinder assembly
11. Steering column assembly
Installation Steps
11. Steering column assembly
10. Lock cylinder assembly
9. Shift lock cable (for A/T)
8. Cushion rubber
7. Snap ring
6. Combination switch
5. Steering column cover
4. Steering wheel
3. Steering lower cover
2. Lower cluster assembly
1. Front console assembly

2A – 86 SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN
INSTALLATION
11. Steering column assembly
Align the setting marks on the universal joint and
steering shaft made during removal.
Tighten the steering column fixing bolt (dash panel)
to the specified torque.
Steering Column Bolt Torque N·m (kg·m/lb·ft)
19 (1.9 / 14)
Tighten the steering column fixing bolt ( pedal
bracket) to the specified torque.
Steering Column Bolt Torque N·m (kg·m/lb·ft)
17 (1.7 / 13)
Tighten the universal joint to the specified torque.
Universal Joint Torque N·m (kg·m/lb·ft)
25 (2.5 / 18)
10. Lock cylinder assembly
9. Shift lock cable (for A/T)
8. Cushion rubber
7. Snap ring
6. Combination switch
After installation of combination switch assembly,
connect the combination switch wiring harness
connector.
5. Steering column cover
4. Steering wheel
Align the setting marks made when removing.
CAUTION:
Never apply force to the steering wheel in direction of the
shaft by using a hammer or other impact tools in an
attempt to remove the steering wheel. The steering shaft
is designed as an energy absorbing unit.
Tighten the steering wheel fixing nut to the specified
torque.
Steering wheel Nut Torque N·m (kg·m/lb·ft)
34 (3.5 / 25)
3. Steering lower cover
Install the engine hood opening lever.
2. Lower cluster assembly
1. Front console assembly
Connect the wiring harness connectors.
Install the transmission (for M/T) and transfer control

DIFFERENTIAL (REAR 220mm)
4A2A±3
Diagnosis
Many noises that seem to come from the rear axle
actually originate from other sources such as tires, road
surface, wheel bearings, engine, transmission, muffler, or
body drumming. Investigate to find the source of the
noise before disassembling the rear axle. Rear axles, like
any other mechanical device, are not absolutely quiet but
should be considered quiet unless some abnormal noise
is present.
To make a systematic check for axle noise, observe the
following:
1. Select a level asphalt road to reduce tire noise and
body drumming.
2. Check rear axle lubricant level to assure correct level,
and then drive the vehicle far enough to thoroughly
warm up the rear axle lubricant.
3. Note the speed at which noise occurs. Stop the
vehicle and put the transmission in neutral. Run the
engine speed slowly up and down to determine if the
noise is caused by exhaust, muffler noise, or other
engine conditions.
4. Tire noise changes with different road surfaces; axle
noises do not. Temporarily inflate all tires to 344 kPa
(3.5kg/cm
2, 50 psi) (for test purposes only). This will
change noise caused by tires but will not affect noise
caused by the rear axle.
Rear axle noise usually stops when coasting at
speeds under 48 km/h (30 mph); however, tire noise
continues with a lower tone. Rear axle noise usually
changes when comparing pull and coast, but tire
noise stays about the same.
Distinguish between tire noise and rear axle noise by
noting if the noise changes with various speeds or
sudden acceleration and deceleration. Exhaust and
axle noise vary under these conditions, while tire
noise remains constant and is more pronounced at
speeds of 32 to 48 km/h (20 to 30 mph). Further check
for tire noise by driving the vehicle over smooth
pavements or dirt roads (not gravel) with the tires at
normal pressure. If the noise is caused by tires, it will
change noticeably with changes in road surface.
5. Loose or rough front wheel bearings will cause noise
which may be confused with rear axle noise; however,
front wheel bearing noise does not change when
comparing drive and coast. Light application of the
brake while holding vehicle speed steady will often
cause wheel bearing noise to diminish. Front wheel
bearings may be checked for noise by jacking up the
wheels and spinning them or by shaking the wheels to
determine if bearings are loose.
6. Rear suspension rubber bushings and spring
insulators dampen out rear axle noise when correctly
installed. Check to see that there is no link or rod
loosened or metal±to±metal contact.
7. Make sure that there is no metal±to±metal contact
between the floor and the frame.
After the noise has been determined to be in the axle, the
type of axle noise should be determined, in order to make
any necessary repairs.
Gear Noise
Gear noise (whine) is audible from 32 to 89 km/h (20 to 55
mph) under four driving conditions.
1. Driving under acceleration or heavy pull.
2. Driving under load or under constant speed.
3. When using enough throttle to keep the vehicle from
driving the engine while the vehicle slows down
gradually (engine still pulls slightly).
4. When coasting with the vehicle in gear and the throttle
closed. The gear noise is usually more noticeable
between 48 and 64 km/h (30 and 40 mph) and 80 and
89 km/h (50 and 55 mph).
Bearing Noise
Bad bearings generally produce a rough growl or grating
sound, rather than the whine typical of gear noise.
Bearing noise frequently ªwow±wowsº at bearing rpm,
indicating a bad pinion or rear axle side bearing. This
noise can be confused with rear wheel bearing noise.
Rear Wheel Bearing Noise
Rear wheel bearing noise continues to be heard while
coasting at low speed with transmission in neutral. Noise
may diminish by gentle braking. Jack up the rear wheels,
spin them by hand and listen for noise at the hubs.
Replace any faulty wheel bearings.
Knock At Low Speeds
Low speed knock can be caused by worn universal joints
or a side gear hub counter bore in the cage that is worn
oversize. Inspect and replace universal joints or cage and
side gears as required.
Backlash Clunk
Excessive clunk on acceleration and deceleration can be
caused by a worn rear axle pinion shaft, a worn cage,
excessive clearance between the axle and the side gear
splines, excessive clearance between the side gear hub
and the counterbore in the cage, worn pinion and side
gear teeth, worn thrust washers, or excessive drive pinion
and ring gear backlash. Remove worn parts and replace
as required. Select close±fitting parts when possible.
Adjust pinion and ring gear backlash.

DIFFERENTIAL (REAR 244mm)
4A2B±3
Diagnosis
Many noises that seem to come from the rear axle
actually originate from other sources such as tires, road
surface, wheel bearings, engine, transmission, muffler, or
body drumming. Investigate to find the source of the
noise before disassembling the rear axle. Rear axles, like
any other mechanical device, are not absolutely quiet but
should be considered quiet unless some abnormal noise
is present.
To make a systematic check for axle noise, observe the
following:
1. Select a level asphalt road to reduce tire noise and
body drumming.
2. Check rear axle lubricant level to assure correct level,
and then drive the vehicle far enough to thoroughly
warm up the rear axle lubricant.
3. Note the speed at which noise occurs. Stop the
vehicle and put the transmission in neutral. Run the
engine speed slowly up and down to determine if the
noise is caused by exhaust, muffler noise, or other
engine conditions.
4. Tire noise changes with different road surfaces; axle
noises do not. Temporarily inflate all tires to 344 kPa
(3.5kg/cm
2, 50 psi) (for test purposes only). This will
change noise caused by tires but will not affect noise
caused by the rear axle.
Rear axle noise usually stops when coasting at
speeds under 48 km/h (30 mph); however, tire noise
continues with a lower tone. Rear axle noise usually
changes when comparing pull and coast, but tire
noise stays about the same.
Distinguish between tire noise and rear axle noise by
noting if the noise changes with various speeds or
sudden acceleration and deceleration. Exhaust and
axle noise vary under these conditions, while tire
noise remains constant and is more pronounced at
speeds of 32 to 48 km/h (20 to 30 mph). Further check
for tire noise by driving the vehicle over smooth
pavements or dirt roads (not gravel) with the tires at
normal pressure. If the noise is caused by tires, it will
change noticeably with changes in road surface.
5. Loose or rough front wheel bearings will cause noise
which may be confused with rear axle noise; however,
front wheel bearing noise does not change when
comparing drive and coast. Light application of the
brake while holding vehicle speed steady will often
cause wheel bearing noise to diminish. Front wheel
bearings may be checked for noise by jacking up the
wheels and spinning them or by shaking the wheels to
determine if bearings are loose.
6. Rear suspension rubber bushings and spring
insulators dampen out rear axle noise when correctly
installed. Check to see that there is no link or rod
loosened or metal±to±metal contact.
7. Make sure that there is no metal±to±metal contact
between the floor and the frame.
After the noise has been determined to be in the axle, the
type of axle noise should be determined, in order to make
any necessary repairs.
Gear Noise
Gear noise (whine) is audible from 32 to 89 km/h (20 to 55
mph) under four driving conditions.
1. Driving under acceleration or heavy pull.
2. Driving under load or under constant speed.
3. When using enough throttle to keep the vehicle from
driving the engine while the vehicle slows down
gradually (engine still pulls slightly).
4. When coasting with the vehicle in gear and the throttle
closed. The gear noise is usually more noticeable
between 48 and 64 km/h (30 and 40 mph) and 80 and
89 km/h (50 and 55 mph).
Bearing Noise
Bad bearings generally produce a rough growl or grating
sound, rather than the whine typical of gear noise.
Bearing noise frequently ªwow±wowsº at bearing rpm,
indicating a bad pinion or rear axle side bearing. This
noise can be confused with rear wheel bearing noise.
Rear Wheel Bearing Noise
Rear wheel bearing noise continues to be heard while
coasting at low speed with transmission in neutral. Noise
may diminish by gentle braking. Jack up the rear wheels,
spin them by hand and listen for noise at the hubs.
Replace any faulty wheel bearings.
Knock At Low Speeds
Low speed knock can be caused by worn universal joints
or a side gear hub counter bore in the cage that is worn
oversize. Inspect and replace universal joints or cage and
side gears as required.
Backlash Clunk
Excessive clunk on acceleration and deceleration can be
caused by a worn rear axle pinion shaft, a worn cage,
excessive clearance between the axle and the side gear
splines, excessive clearance between the side gear hub
and the counterbore in the cage, worn pinion and side
gear teeth, worn thrust washers, or excessive drive pinion
and ring gear backlash. Remove worn parts and replace
as required. Select close±fitting parts when possible.
Adjust pinion and ring gear backlash.

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±6
High-Low Planetary Gear Set
Establishes an auxiliary transmission mechanism. When
the transfer shift lever is set to the 2H or TOD position, the
reduction gear ratio is 1.000 and the corresponding
driving force is generated. When the transfer shift lever is
set to the 4L position, the reduction gear ratio is 2.480 and
the corresponding driving force is generated.
262RW030
4H and 4L Switches
Detects the shift position of the transfer from the
movement of the transfer lever and outputs signals to the
TOD control unit.
261RW002
Transfer Connector
Transmits the input and output signals of the speed
sensors, electromagnetic coil, and 4H and 4L switches to
the vehicle harness. A waterproof 12-pin type is used.
261RW046
TOD Indicator Lamps (on the instrument
panel)
Inform the following items.

Bulb check

Drive mode

ABS IN status

BRAKE ON status
821RW049

4C±47 DRIVE SHAFT SYSTEM
Main Data and Specifications
General Specifications
Engine6VE1 (3.5L)6VD1 (3.2L)4JX1 (3.0L)4JG2 (3.1L)
Transmission
M/TA/T
A/T
with
TOD
M/TA/T
A/T
with
TOD
M/TA/TM/TA/T
Construction
Hollow steel tube
with yoke and
spider type
universal joint
Hollow
steel
tube
with
consta
nt
velocity
joints
Hollow steel tube
with yoke and
spider type
universal joint
Hollow
steel
tube
with
consta
nt
velocity
joints
Hollow steel tube with yoke and
spider type universal joint
Outside
diameter40.0mm (1.57 in)
Length559mm
(22.01in)559mm
(22.01in)577mm
(22.72in)393mm
(15.47in)559mm
(22.01in)577mm
(22.72in)627mm
(24.69in)627mm
(24.69in)421mm
(16.57in)627mm
(24.69in)
Torque Specifications
E04RW021

4C±55 DRIVE SHAFT SYSTEM
Main Data and Specifications
General Specifications
Engine6VE1 (3.5L)6VD1 (3.2L)4JX1 (3.0L)4JG2 (3.1L)
Transmission
M/TA/T
A/T
with
TOD
M/TA/T
A/T
with
TOD
M/TA/TM/TA/T
ConstructionHollow steel tube with yoke and spider type universal joint
LengthS
W
B
668mm (26.30in)Ð846mm
(33.31in)678mm
(26.69in)Ð604mm (23.78in)810mm
(31.89in)Ð
L
W
B
1093mm (43.03in)1075mm
(42.32in)1271mm
(50.04in)1103mm
(43.43in)1083mm
(42.64in)1029mm (40.51in)1236mm
(48.66in)1037mm
(40.83in)
Outside
diamterS
W
B
68.9mm (2.71in)Ð68.9mm (2.71in)Ð68.9mm (2.71in)Ð
LW
B68.9mm (2.71in)82.6mm
(3.25in)68.9mm (2.71in)82.6mm
(3.25in)68.9mm
(2.71in)
Torque Specifications
E04RW023

TRANSFER CASE (STANDARD TYPE)
4D1±9
266RW002
7. Connect the rear propeller shaft to the transfer case
and tighten to the specified torque.
Torque: 63 N´m (6.4kg´m/46 lb ft)
Transfer Case Assembly
Removal
NOTE: Before removing the transmission & transfer
assembly from the vehicle, change the transfer mode to
2WD by pushing button switch on dash panel. (4WD
Switch Model)
1. Disconnect the battery ground cable.
2. Drain the transfer case fluid, if overhauling the
transter case assembly.
3. Remove the exhaust and transfer protectors.
4. Remove the rear and front propeller shafts from the
transfer case side.
5. Remove the transfer control lever knob.
6. Disconnect the harness connectors and remove the
front console.
7. Remove the selector lever assembly. Refer to
Selector Lever in the Section 7A.
8. Remove the transfer control lever.
9. Disconnect the 4WD switch connector, speed sensor
harness connector and 2WD±4WD actuator harness
connector (4WD Switch Model) from the transmission
harness.10. Support the transfer case with a transmission jack.
11. Remove the transmission±transfer bolts and the nut
(M/T).
12. Remove the transfer case assembly from the vehicle.

4D1±10
TRANSFER CASE (STANDARD TYPE)
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
1. Apply a thin coat of molybdenum disulfide grease to
the input shaft spline and install the transter case
assembly to the vehicle.
260RW001
2. Tighten the transmission±transfer bolts and the nut
(M/T) to the specified torque.
Torque: 46 N´m (4.7kg´m/34 lb ft)
3. Tighten the propeller shaft bolts to the specified
torque.
Torque: 63 N´m (6.4kg´m/46 lb ft)
4. Tighten the transfer protector bolts to the specified
torque.
Torque: 37 N´m (3.8kg´m/27 lb ft)
256RW030