Jeep Cherokee 2000 Service Manual - page 143
DIAGNOSTIC CHART
Condition
Possible Causes
Correction
Wheel Noise
1. Wheel loose.
1. Tighten loose nuts.
2. Faulty, brinelled wheel bearing.
2. Replace bearing.
Axle Shaft Noise
1. Misaligned axle tube.
1. Inspect axle tube alignment. Correct as
necessary.
2. Bent or sprung axle shaft.
2. Inspect and correct as necessary.
3. End-play in pinion bearings.
3. Refer to pinion pre-load information and
correct as necessary.
4. Excessive gear backlash
between the ring gear and pinion.
4. Check adjustment of the ring gear and
pinion backlash. Correct as necessary.
5. Improper adjustment of pinion
gear bearings.
5. Adjust the pinion bearings pre-load.
6. Loose pinion yoke nut.
6. Tighten the pinion yoke nut.
7. Scuffed gear tooth contact
surfaces.
7. Inspect and replace as necessary.
Axle Shaft Broke
1. Misaligned axle tube.
1. Replace the broken shaft after correcting
tube mis-alignment.
2 Vehicle overloaded.
2. Replace broken shaft and avoid excessive
weight on vehicle.
3. Erratic clutch operation.
3. Replace broken shaft and avoid or correct
erratic clutch operation.
4. Grabbing clutch.
4. Replace broken shaft and inspect and
repair clutch as necessary.
Differential Cracked
1. Improper adjustment of the
differential bearings.
1. Replace case and inspect gears and
bearings for further damage. Set differential
bearing pre-load properly.
2. Excessive ring gear backlash.
2. Replace case and inspect gears and
bearings for further damage. Set ring gear
backlash properly.
3. Vehicle overloaded.
3. Replace case and inspect gears and
bearings for further damage. Avoid excessive
vehicle weight.
4. Erratic clutch operation.
4. Replace case and inspect gears and
bearings for further damage. Avoid erratic use
of clutch.
Differential Gears Scored
1. Insufficient lubrication.
1. Replace scored gears. Fill differential with
the correct fluid type and quantity.
2. Improper grade of lubricant.
2. Replace scored gears. Fill differential with
the correct fluid type and quantity.
3. Excessive spinning of one
wheel/tire.
3. Replace scored gears. Inspect all gears,
pinion bores, and shaft for damage. Service
as necessary.
XJ
8 1/4 REAR AXLE
3 - 107
DIAGNOSIS AND TESTING (Continued)