|
|
NOTE: All driveline components should be examined before starting any repair. DRIVELINE SNAP A snap or clunk noise when the vehicle is shifted into gear or the clutch engaged, can be caused by: • High engine idle speed. • Transmission shift operation. • Loose engine/transmission/transfer case mounts. • Worn U-joints/CV joint. • Loose spring mounts. • Loose pinion gear nut and yoke. • Excessive ring gear backlash. • Excessive side gear to case clearance. To determined the source of a snap/clunk noise, raise vehicle on a hoist with the wheels free to rotate. Have a DIAGNOSTIC CHART Condition Possible Causes Correction Wheel Noise 1. Wheel loose. 1. Tighten loose nuts. 2. Worn 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 3 - 32 FRONT AXLE - 186FIA KJ |