ISUZU TROOPER 1998 Service Repair Manual

4A2B±18DIFFERENTIAL (REAR 244mm)
4. Adjust feeler gauge thickness from side to side
until ring gear backlash is in the specified range.
Backlash: 0.13± 0.2mm (0.005± 0.008in)
425RS032With zero end play and correct backlash
established, remove the feeler gauge packs,
determine the thickness of the shims required and
add 0.05 mm (0.002 in) to each shim pack to
provide side bearing preload. Always use new
shims.
5. Remove side bearing by using remover
5±8840±2587±0 and adapter 5±8840±2576±0.
415RW041
12. Install the side bearings together with the selected
shims by using installer 5±8840±2570±0 (2) and grip
5±8840±0007±0 (1).
425RW032
13. Install side bearing outer race.
14. Install differential cage assembly.
15. Align the setting marks (1) applied at disassembly
then install the bearing cap.
425RS035

DIFFERENTIAL (REAR 244mm)
4A2B±19
16. Tighten the bolt to the specified torque.
Torque:108N´m (11.0kg´m/80 lb ft)
425RS036
Gear Tooth Contact Pattern Check and Adjustment
1. Apply a thin coat of Prussian blue or equivalent to the
faces of the 7±8 teeth of the ring gear. Check the
impression of contact on the ring gear teeth and make
necessary adjustment as described in illustration if
the contact is abnormal.
425RS038
Legend
(1) Heel
(2) Toe
(3) Concave Side(Coast)
(4) Convex Side(Drive)
425RS039

4A2B±20DIFFERENTIAL (REAR 244mm)
Differential Cage Assembly
Disassembled View
415RW010
Legend
(1) Thrust Washer (for Pinion Gear)
(2) Pinion Mate Gear
(3) Thrust Washer(for Side Gear)
(4) Side Gear(5) Differential Shaft
(6) Ring Gear
(7) Bolt
(8) Differention Cage
(9) Lock Pin

DIFFERENTIAL (REAR 244mm)
4A2B±21
Disassembly
1. Remove bolt.
2. Remove ring gear.
3. Remove lock pin using a small drift.
425RS042
4. Remove the differential shaft by using a hard metal
rod and a hammer.
425RS043
5. Remove pinion mate gear and thrust washer.
6. Remove side gear and thrust washer.
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal conditions are
found through inspection.
Check the following parts:

Ring gear, pinion gear

Bearing
Side gear, pinion mate gear, differential shaft

Differential cage, carrier

Thrust washer

Oil seal
Ring gear replacement:
1. The ring gear should always be replaced with the
drive pinion as a set.
2. Discard used bolts and install new ones.
3. Tighten the fixing bolts in a diagonal sequence as
illustrated.
Torque: 177N´m (18.0kg´m/130 lb ft)
425RW033
Reassembly
425RS048
1. Install side gear with thrust washer.

4A2B±22DIFFERENTIAL (REAR 244mm)
2. Install the pinion mate gear with thrust washer by
engaging it with the side gears while turning both
pinion mate gears simultaneously in the same
direction.
425RS048
3. Install differential shaft.
1. Be sure to install the differential shaft so that it is in
alignment with the lock pin hole in the differential
cage.
425RS049
4. Install lock pin.
After lock pin installation, stake the case to secure the
lock pin.
5. Install ring gear.6. Tighten the bolts in diagonal sequence as illustrated.
Torque: 177N´m (18.0kg´m/130 lb ft)
NOTE: Discard used bolts and install new ones.
425RW033

DIFFERENTIAL (REAR 244mm)
4A2B±23
Locking Differential Assembly
Disassembled View
425RW027
Legend
(1) Thrust Washer±Differential Pinion Mate Gear
(2) Pinion Mate Gear
(3) Dished Spacer
(4) Disc
(5) Plate
(6) Ring Gear(7) Differential Plate Retainer
(8) Lock Pin
(9) Differential Case
(10) Ring Gear Bolts
(11) Differential Shaft
(12) Differential Side Gear
Disassembly
1. Remove ring gear.
2. Place one of the axle shafts, which was removed from
the assembly, into a vise. Tighten shaft in vise firmly.
The spline end of the shaft is not to exceed 3 inches
(76.2 mm) above the top of the vise.
Position the differential on the shaft with the ring gear
side down.
3. Remove Lock pin (1) from differential shaft using a
punch.

4A2B±24DIFFERENTIAL (REAR 244mm)
4. Remove Differential shaft (2) using hammer and
punch.
Place shop towel behind case to prevent differential
shaft from dropping out of case.
425RW005
5. Assemble clutch pack unloading tool
5±8840±2586±0 .
a. Install cap (1) to the bottom differential side gear.
b. Install threaded screw cap (2) to top differential
side gear. Thread forcing screws (3) into threaded
screw cap until it becomes centered into the
bottom cap.
425RW064
c. Tighten forcing screw until tight enough to collapse
dished spacers and allow looseness between side
and pinion mate gears.6. Both pinion mate gear thrust washers using a shim
stock (1) of 0.51 mm (0.020 in.) or equivalent tool to
push out washers.
425RW007
7. Relieve tension of dished spacers by loosening
forcing screw.
NOTE:

You may have to adjust the forcing screw slightly to
allow the case to rotate.
8. Insert differential shaft into its hole of case. Pull on
shaft and rotate case until pinion mate gears can be
removed.
9. Remove pinion mate gears.
10. Hold side gear top clutch pack (1) with one hand and
remove positraction unloading tools.
425RW008

DIFFERENTIAL (REAR 244mm)
4A2B±25
11. Remove top side gear and clutch pack.
NOTE:

Keep the stack of plates and discs intact and in
exactly the same position while they are being
removed.
12. Remove case from holder. Turn case with flange or
ring gear side up to allow side gear and clutch pack to
be removed from case.
13. Remove differential plate retainer from both clutch
packs to allow separation of the plates and discs.
NOTE:

Keep the discs and plates in the same order as they
were removed.
425RW009
Legend
(1) Differential Plate
(2) Differential Disc
(3) Dished Spacer
(4) Side Gear
Inspection and Repair
Cleaning

All parts with solvent.
Visual Inspection

Clean all parts with solvent.

Plates and Discs. If any one disc or plate in either
stack shows evidence of excessive wear or scoring,
the complete stack is to be replaced on both sides.

Side Gears and Pinion Mate Gears. The gear teeth of
these parts should be checked for extreme wear and
possible cracks. The external teeth of the side gear,
which retain the concentric groove discs, should also
be checked for wear or cracks.

If replacement of one gear is required due to wear,
etc., then both side gears, pinion mate gears, and
thrust washers are to be replaced.
Differential Shaft. If excessive wear is evident, the
differential shaft should be replaced.

Differential Plate Retainers. If wear is evident on any
one of the differential plate retainers, all four retainers
must be replaced.

Differential Case. If scoring, wear or metal pickup is
evident on the machined surfaces, replacement of
the case is necessary.
Reassembly
1. Lubricate thrust face of side gears, plates and discs
with the proper limited slip rear axle lubricant.
2. Assemble plates and discs in exactly in the same
position as they were removed, regardless of whether
they are new or original.
3. Install differential plate retainer to ears of plates.
NOTE:

Make sure both retainers are completely seated on
ears of plates.
4. Install clutch pack and side gear into bottom side gear
bore. Make sure clutch pack stays assembled to side
gear splines, and that retainers are completely seated
into pockets of case.
NOTE:

To prevent clutch pack from falling out of case, hold
clutch pack in place by hand while repositioning case
on bench.
5. Install other side gear and clutch pack. Make sure
clutch pack stays assembled to side gear splines, and
retainers are completely seated into pockets of case.
6. Hold clutch pack in position and assemble special tool
5±8840±2586±0, screw cap (2), cap (1) and forcing
screw (3). Tighten forcing screw into bottom cap to
hold both clutch packs in position.
7. With tools assembled to case, position case on shaft
by aligning splines of side gear with those of shaft.
Tighten forcing screw to compress clutch packs in
order to provide clearance for pinion mate gears.
425RW064

4A2B±26DIFFERENTIAL (REAR 244mm)
8. Install pinion mate gears.

Place the pinion mate gears into the differential 180
degrees apart.
9. While holding gears in place, insert differential shaft in
its hole of case. Pull on shaft and rotate case, allowing
gears to turn. Make sure that holes in pinion mate
gears align with holes in case.

It may be necessary to adjust tension on forcing
screw to rotate case.
10. Tighten forcing screw to compress the clutch packs,
to allow installation of tapered washers.
11. Lubricate tapered washers (2), and assemble into
case (1). Use a small screw driver to push washers
into place. Remove tools.
425RW012
12. Position differential shaft in case and drive in with
hammer. Be sure lock pin hole of differential shaft (5)
is properly aligned to allow installation of lock pin (3).
Be sure that thrust washers and differential pinion
gears are aligned with the differential case (4). Install
new lock pin to proper depth using a punch.
Stake (peen) metal of case over pin in two places, 180
degrees apart.
425RW013
13. Install ring gear and tighten the bolts in diagonal
sequence as illustrated.
Torque: 177N´m (18.0kg´m/130 lb ft)
NOTE: Discard used bolts and install new ones.
425RW033

DIFFERENTIAL (REAR 244mm)
4A2B±27
Main Data and Specifications
General Specifications
Rear axle
TypeBanjo, Semi±floating
Rear axle Size244 mm (9.61 in)
Gear typeHypoid
Gear ratio (to 1)4.100(6VE1 with A/T)
4.300(6VE1 with M/T,4JX1)
Differential typeTwo pinion
Lubricant GradeGL±5: (Standard differential)
GL±5, LSD: (Limited slip differential)
Locking Differential Lubricant80W90 GL±5
(USE Limited Slip Differential Gear Lubricant or Friction
Modifier Organic Additive)
Capacity3.0 liter (2.6 Imp qt/3.2 US qt)