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Differential bearings usually produce a low pitch noise. The differential bearing noise is constant and varies only Axle shaft bearing noise generally changes when the bearings are loaded. Turn vehicle sharply to the left and the LOW SPEED KNOCK Low speed knock is generally caused by: • Worn U-joints/CV joint. • Worn side-gear thrust washers. • Worn pinion shaft bore. VIBRATION Vibration at the rear of the vehicle is usually caused by: • Damaged drive shaft. • Missing drive shaft balance weight(s). • Worn or out-of-balance wheels. • Loose wheel lug nuts. • Worn U-joints/CV joint. • Loose/broken springs. • Damaged axle shaft bearing(s). • Loose pinion gear nut. • Excessive pinion yoke run out. • Bent axle shaft(s). Check for loose or damaged front-end components or engine/transmission mounts. These components can contrib- 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 3 - 218 REAR AXLE - C213RE WK |