Condition Possible Causes Correction
Axle Shaft Broke 1.Vehicle overloaded. 1. Replace broken shaft and avoid
excessive weight on vehicle.
2. Erratic clutch operation. 2. Replace broken shaft and avoid
or correct erratic clutch operation.
3. Grabbing clutch. 3. Replace broken shaft and
inspect and repair clutch as neces-
sary.
Differential Cracked 1. Improper adjustment of the dif-
ferential 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 differ-
ential with the correct fluid type
and quantity.
2. Improper grade of lubricant. 2. Replace scored gears. Fill differ-
ential 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.
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.
ZB REAR AXLE - 226RIA 3 - 13
REAR AXLE - 226RIA (Continued)
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