Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1127

4A1–2

DIFFERENTIAL (FRONT)

Front Drive Axle

Diagnosis

Condition

Possible cause

Correction

Oil Leak At Front Axle

Worn or defective oil seal.

Replace the oil seal.

Front axle housing cracked.

Repair or replace.

Oil Leak At Pinion Shaft

Too 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
Joint

Broken or worn drive shaft joints and
bellows (BJ and DOJ).

Replace the drive shaft joints and
bellows.

“Clank" When Accelerating From
“Coast"

Loose 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.

Worn 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 Speeds

Out of balance or out of round tires.

Balance or replace.

Front end out of alignment.

Align.

Noises in Front Axle

Insufficient 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.

Hub unit bearing worn.

Replace the hub unit bearing.

Differential bearing loose or worn.

Tighten or replace.

Wanders and Pulls

Incorrect front alignment.

Adjust the front alignment.

Steering unit loose or worn.

Tighten or replace.

Tire worn or improperly inflated.

Adjust the inflation or replace.

Front or rear suspension parts loose
or broken.

Tighten or replace.

Front Wheel Shimmy

Hub unit bearing worn.

Replace.

Incorrect front alignment.

Adjust the front alignment.

Worn ball joint or bush.

Replace the ball joint or bush.

Steering unit loose or worn.

Tighten or replace.

Tire worn or improperly inflated.

Replace or adjust the inflation.

Shock absorber worn.

Replace the shock absorber.

DIFFERENTIAL (FRONT)

4A1–3

Pinion Shaft Oil Seal

Pinion Shaft Oil Seal and Associated Parts

415RW012

EndOFCallout

Removal

1. Raise the vehicle and support it at the frame.

The hoist must remain under the front axle housing.

2. Drain the front axle oil by loosening the drain

plug(1).

412RS001

Legend

(1) Flange Nut
(2) Flange
(3) Oil Seal

(4) Oil Seal Slinger
(5) Outer Bearing
(6) Collapsible Spacer

4A1–4

DIFFERENTIAL (FRONT)

3. Remove the front propeller shaft. Refer to Front

Propeller Shaft in this section.

4. Remove flange nut by using pinion flange holder J–

8614–01.

415RS018

5. Remove flange.

6. Remove oil seal.

7. Remove outer bearing by using remover J–39602. 

415RS001

8. Remove collapsible spacer.

Inspection and Repair

Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts.

1. Seal surface of the pinion.

2. Cage bore for burns.

Installation

1. Install collapsible spacer. Discard the used

collapsible spacer and install a new one.

2. Install outer bearing.

NOTE:  Do not drive in, but just temporarily set in the
outer bearing by hand, which should be indirectly
pressed in finally by tightening the flange nut.

3. Install oil seal, use oil seal installer J–24250 to

install a new oil seal that has grease on seal lip.

415RS002

4. Install flange.

5. Install flange nut, refer to Differential Assembly

Overhaul for flange nut reassembly in this section.

NOTE:  Discard the used nut and install a new one.

DIFFERENTIAL (FRONT)

4A1–5

Front Drive Axle Assembly

Front Drive Axle Assembly and Associated Parts

412R200010

EndOFCallout

Legend

(1) Propeller Shaft
(2) Mounting Nut
(3) Front Axle Case Assembly and Front Drive 

Shaft Assembly

(4) Washer

(5) Mounting Bolt
(6) Tie–rod End; Power Steering Unit
(7) Knuckle and Back Plate
(8) Hub and Disc Assembly
(9) Suspension Crossmember