Isuzu KB P190. Manual — part 123

4B-48 REAR AXLE

3) Intermittent Noise

Checkpoint

Trouble

Cause

Countermeasure

Axle case inside

Ring gear

Remove the foreign material

Replace the drive pinion and

the ring gear as a set

Foreign material in the axle

case

Warped ring gear

Differential cage

Tighten the differential cage

bolts

Replace the shaft

Loose differential cage bolts

Too much spline play

OK

NG

NG

NG

NG

OK

OK

Axle shaft

REAR AXLE 4B-49

4) Noise when the Vehicle is Turning

Checkpoint

Trouble

Cause

Countermeasure

Differential cross pin

Side gear

Replace the differential cross

pin

Replace the side gear

Worn differential cross pin

Worn side gear

Differential pinion

Replace the differential pinion

Replace the rear axle shaft

Worn differential pinion

Worn rear axle shaft splines

OK

NG

NG

NG

NG

OK

OK

Rear axle shaft

4B-50 REAR AXLE

5) Constant Noise

Checkpoint

Trouble

Cause

Countermeasure

Replace the rear axle shaft

Bent rear axle shaft

NG

Replace the side bearing

Replace the drive pinion

bearing

Replace the drive pinion and

the ring gear as a set

Replace the drive pinion and

the ring gear as a set

Flat spot on the side bearing

oil seal

Bearing

Flat spot on the drive pinion

Flat spot on the gear teeth

pilot bearing wear

Drive pinion

Flat spot on the drive pinion

gear teeth

Ring gear

Replace the drive pinion and

the ring gear as a set

Worn pinion splines oil seal

NG

NG

NG

NG

NG

OK

OK

OK

Rear axle shaft

REAR AXLE 4B-51

2. VIBRATION

Checkpoint

Trouble

Cause

Countermeasure

Replace the rear axle shaft

Bent rear axle shaft

Replace the rear hub bearing

Worn rear hub bearing

OK

Rear axle shaft

NG

NG

Rear hub bearing