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Condition Possible Causes Correction Differential Cracked 1. Improper adjustment of the 1. Replace case and inspect gears and 2. Excessive ring gear backlash. 2. Replace case and inspect gears and 3. Vehicle overloaded. 3. Replace case and inspect gears and 4. Erratic clutch operation. 4. Replace case and inspect gears and Differential Gears Scored 1. Insufficient lubrication. 1. Replace scored gears. Fill differential 2. Improper grade of lubricant. 2. Replace scored gears. Fill differential 3. Excessive spinning of one 3. Replace scored gears. Inspect all 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 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 2. Erratic clutch operation. 2. Replace gears and examine the 3. Ice-spotted pavement. 3. Replace gears and examine 4. Improper adjustments. 4. Replace gears and examine 3 - 82 REAR AXLE - 9 1/4 AN REAR AXLE - 9 1/4 (Continued) |