1998 ISUZU TROOPER Service Repair Manual

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Page 433 of 3573

ISUZU TROOPER 1998 Service Repair Manual 3E – 2 WHEELS AND TIRES
GENERAL DESCRIPTION
Replacement wheels or tires must be equivalent to
the originals in load capacity, specified dimension
and mounting configuration. Improper size or type
ma

Page 434 of 3573

ISUZU TROOPER 1998 Service Repair Manual WHEELS AND TIRES 3E – 3
ON-VEHICLE SERVICE
WHEELS
2. Wheel and tire
1. Wheel lug nut
Removal Steps
1. Wheel lug nut
2. Wheel and tire
Installation Steps
2. Wheel and tire
1. Wheel lug nut
480RV004

Page 435 of 3573

ISUZU TROOPER 1998 Service Repair Manual 3E – 4 WHEELS AND TIRES
TIRES
REPLACEMENT
When replacement is necessary, the original metric size
should be used. Most metric tire sizes do not have exact
corresponding alphanumeric tire sizes. It i

Page 436 of 3573

ISUZU TROOPER 1998 Service Repair Manual WHEELS AND TIRES 3E – 5
WHEELS
REPLACEMENT
Damaged wheels and wheels with excessive runout must
be replaced.
Wheel Runout at Rim (Based on Hub bore.)
GENERAL BALANCE PROCEDURE
Deposits of mud, etc.

Page 437 of 3573

ISUZU TROOPER 1998 Service Repair Manual 3E – 6 WHEELS AND TIRES
BALANCING WHEEL AND TIRE
ON-VEHICLE BALANCING
On-Vehicle balancing methods vary with equipment and
tool manufacturers. Be sure to follow each manufacturer’s
instructions du

Page 438 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4A1±1 DIFFERENTIAL (FRONT)
DRIVELINE/AXLE
CONTENTS
Differential (Front) 4A1. . . . . . . . . . . . . . . . . . . . . . .
Differential (Rear/220mm) 4A2A. . . . . . . . . . . . . . . .
Differential (

4A1±1 DIFFERENTIAL (FRONT)
DRIVELINE/AXLE
CONTENTS
Differential (Front) 4A1. . . . . . . . . . . . . . . . . . . . . . .
Differential (Rear/220mm) 4A2A. . . . . . . . . . . . . . . .
Differential (Rear/244mm) 4A2B. . . . . . . . . . . . . . . .
Driveline Control System (Shift on the Fly) 4B1. . Driveline Control System (TOD) 4B2. . . . . . . . . . .
Driveshaft System 4C. . . . . . . . . . . . . . . . . . . . . . .
Transfer Case (Standard Type) 4D1. . . . . . . . . . .
Transfer Case (TOD) 4D2. . . . . . . . . . . . . . . . . . . .
DIFFERENTIAL (FRONT)
CONTENTS
Service Precaution 4A1±1. . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle 4A1±2. . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis 4A1±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinion Shaft Oil Seal 4A1±3. . . . . . . . . . . . . . . . . . . . .
Pinion Shaft Oil Seal and Associated Parts 4A1±3
Removal 4A1±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4A1±4. . . . . . . . . . . . . . . . . .
Installation 4A1±4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle Assembly 4A1±5. . . . . . . . . . . . . . .
Front Drive Axle Assembly and
Associated Parts 4A1±5. . . . . . . . . . . . . . . . . . . . . .
Removal 4A1±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 4A1±7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Assembly 4A1±9. . . . . . . . . . . . . . . . . . . .
Disassembled View 4A1±9. . . . . . . . . . . . . . . . . . . .
Disassembly 4A1±9. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 4A1±12. . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Cage Assembly 4A1±21. . . . . . . . . . . . . . .
Disassembled View 4A1±21. . . . . . . . . . . . . . . . . . . .
Disassembly 4A1±21. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4A1±22. . . . . . . . . . . . . . . . . .
Reassembly 4A1±23. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 4A1±25. . . . . . . . . . .
Special Tools 4A1±28. . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE REFORMING SERVICE ON
OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED , do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally,such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specification. Following these
instructions can help you avoid damage to parts and
systems.

Page 439 of 3573

ISUZU TROOPER 1998 Service Repair Manual DIFFERENTIAL (FRONT) 4A1±2
Front Drive Axle
Diagnosis
ConditionPossible causeCorrection
Oil Leak At Front AxleWorn or defective oil seal.Replace the oil seal.
Front axle housing cracked.Repair or rep

DIFFERENTIAL (FRONT) 4A1±2
Front Drive Axle
Diagnosis
ConditionPossible causeCorrection
Oil Leak At Front AxleWorn or defective oil seal.Replace the oil seal.
Front axle housing cracked.Repair or replace.
Oil Leak At Pinion ShaftToo much gear oil.Correct the oil level.
Oil seal worn or defective.Replace the oil seal.
Pinion flange loose or damaged.Tighten or replace.
Noises In Front Axle Drive Shaft
JointBroken or worn drive shaft joints and
bellows (BJ and DOJ).Replace the drive shaft joints and
bellows.
ªClankº When Accelerating From
ªCoastºLoose drive shaft joint to output shaft
bolts.Tighten.
Damaged inner drive shaft joint.Replace.
Shudder or Vibration During
Acceleration
Excessive drive shaft joint angle.Repair.
AccelerationWorn or damaged drive shaft joints.Replace.
Sticking spider assembly (inner drive
shaft joint).Lubricate or replace.
Sticking joint assembly (outer drive
shaft joint).Lubricate or replace.
Vibration At Highway SpeedsOut of balance or out of round tires.Balance or replace.
Front end out of alignment.Align.
Noises in Front AxleInsufficient gear oil.Replenish the gear oil.
Wrong or poor grade gear oil.Replace the gear oil.
Drive pinion to ring gear backlash
incorrect.Adjust the backlash.
Worn or chipped ring gear, pinion
gear or side gear.Replace the ring gear, pinion gear or
side gear.
Pinion shaft bearing worn.Replace the pinion shaft bearing.
Wheel bearing worn.Replace the wheel bearing.
Differential bearing loose or worn.Tighten or replace.
Wanders and PullsWheel bearing preload too tight.Adjust the wheel bearing preload.
Incorrect front alignment.Adjust the front alignment.
Steering linkage loose or worn.Tighten or replace.
Steering gear out of adjustment.Adjust or replace the steering gear.
Tire worn or improperly inflated.Adjust the inflation or replace.
Front or rear suspension parts loose
or broken.Tighten or replace.
Front Wheel ShimmyWheel bearing worn or improperly
adjusted.Adjust or replace.
Incorrect front alignment.Adjust the front alignment.
Worn ball joint or bush.Replace the ball joint or bush.
Steering linkage loose or worn.Tighten or replace.
Steering gear out of adjustment.Tighten or replace.
Tire worn or improperly inflated.Replace or adjust the inflation.
Shock absorber worn.Replace the shock absorber.

Page 440 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4A1±3 DIFFERENTIAL (FRONT)
Pinion Shaft Oil Seal
Pinion Shaft Oil Seal and Associated Parts
415RW015
Legend
(1) Flange Nut
(2) Flange(3) Oil Seal
(4) Outer Bearing
(5) Collapsible Spacer
Removal
1. R

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