Isuzu 1999 RODEO Workshop Manual page 237

DIFFERNTIAL (REAR)
4A2–4
Rear Axle Noise
Condition
Noise in Drive
Noisy when coasting
Intermittent noise
Constant noise
Noisy on turns
Limited Slip Differential
Condition
Does not lock
Chatters in turns
Noise (in addition to normal clutch
engagement)
engagement)
Possible cause
Excessive pinion to ring
backlash.
Worn pinion and ring gear.
Worn pinion .bearings.
Loose pinion bearings.
Excessive pinion end play.
Worn side bearings.
Loose side bearings.
Excessive ring gear run-out.
Low oil level.
Wrong or poor grade oil.
Bent axle housing.
Axle noise heard when driving will
usually be heard also on coasting,
although not as loud.
Pinion and ring gear too tight (audible
when slowing down and disappears
when driving).
Warped bevel ring.
Loose differential case bolts.
Flat spot on pinion or ring gear teeth.
Flat spot on bearing.
Worn pinion splines.
Worn axle shaft dowel holes.
Worn hub studs.
Bent axle shaft.
Worn differential side gears and
pinions.
Worn differential shaft.
Worn axle shaft splines.
Possible cause
Broken clutch plates.
Lubricant contaminated.
Clutch plates dateriorated.
Broken clutch plates.
Damaged case.
Broken differential gears.
Correction
gear Adjust.
Replace
Replace.
Adjust.
Adjust.
Replace.
Adjust.
Replace.
Replenish.
Replace.
Replace.
Adjust or replace.
Adjust.
Replace.
Tighten.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Correction
Replace the clutch plates.
Drain lube when hot. Wipe carrier
clean. Refill with lube specified in
Main Data and Specifications at the
end of this section.
Replace clutch plates.
Replace clutch plates.
Replace unit.
Replace gears.