Jeep Cherokee 2000 Service Manual - page 148
Condition
Possible Causes
Correction
Loss Of Lubricant
1. Lubricant level too high.
1. Drain lubricant to the correct level.
2. Worn axle shaft seals.
2. Replace seals.
3. Cracked differential housing.
3. Repair as necessary.
4. Worn pinion seal.
4. Replace seal.
5. Worn/scored yoke.
5. Replace yoke and seal.
6. Axle cover not properly sealed.
6. Remove, clean, and re-seal cover.
Axle Overheating
1. Lubricant level low.
1. Fill differential to correct level.
2. Improper grade of lubricant.
2. Fill differential with the correct fluid type
and quantity.
3. Bearing pre-loads too high.
3. Re-adjust bearing pre-loads.
4. Insufficient ring gear backlash.
4. Re-adjust ring gear backlash.
Gear Teeth Broke
1. Overloading.
1. Replace gears. Examine other gears and
bearings for possible damage.
2. Erratic clutch operation.
2. Replace gears and examine the remaining
parts for damage. Avoid erratic clutch
operation.
3. Ice-spotted pavement.
3. Replace gears and examine remaining
parts for damage.
4. Improper adjustments.
4. Replace gears and examine remaining
parts for damage. Ensure ring gear backlash
is correct.
Axle Noise
1. Insufficient lubricant.
1. Fill differential with the correct fluid type
and quantity.
2. Improper ring gear and pinion
adjustment.
2. Check ring gear and pinion contact pattern.
3. Unmatched ring gear and pinion.
3. Replace gears with a matched ring gear
and pinion.
4. Worn teeth on ring gear and/or
pinion.
4. Replace ring gear and pinion.
5. Loose pinion bearings.
5. Adjust pinion bearing pre-load.
6. Loose differential bearings.
6. Adjust differential bearing pre-load.
7. Mis-aligned or sprung ring gear.
7. Measure ring gear run-out. Replace
components as necessary.
8. Loose differential bearing cap
bolts.
8. Inspect differential components and replace
as necessary. Ensure that the bearing caps
are torqued tot he proper specification.
9. Housing not machined properly.
9. Replace housing.
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8 1/4 REAR AXLE
XJ
DIAGNOSIS AND TESTING (Continued)