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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. 2. Bent or sprung axle shaft. 2. Inspect and correct as necessary. 3. End-play in pinion bearings. 3. Refer to pinion pre-load 4. Excessive gear backlash 4. Check adjustment of the ring 5. Improper adjustment of pinion 5. Adjust the pinion bearings 6. Loose pinion yoke nut. 6. Tighten the pinion yoke nut. 7. Scuffed gear tooth contact 7. Inspect and replace as Axle Shaft Broke 1. Misaligned axle tube. 1. Replace the broken shaft after 2 Vehicle overloaded. 2. Replace broken shaft and avoid 3. Erratic clutch operation. 3. Replace broken shaft and avoid 4. Grabbing clutch. 4. Replace broken shaft and inspect Differential Cracked 1. Improper adjustment of the 1. Replace case and inspect gears 2. Excessive ring gear backlash. 2. Replace case and inspect gears 3. Vehicle overloaded. 3. Replace case and inspect gears 4. Erratic clutch operation. 4. Replace case and inspect gears 3 - 14 TUBE AND 186 FBI AXLE WJ DIAGNOSIS AND TESTING (Continued) |