TESTING
- Raise vehicle so both rear wheels can be rotated freely by hand. With one wheel stationary, rotate other wheel about 1/2 turn every second. Wheel should rotate freely. If both wheels turn, or try to turn, differential is defective.
- Raise vehicle and have assistant in vehicle start engine. Allow it to idle at 600-800 RPM. If equipped with A/T, place transmission in Drive and apply brakes. If equipped with M/T, depress clutch and place transmission in first gear. Pull on one parking brake cable from under vehicle to lock one rear wheel.
- With engine idling, on A/T models, slowly release brake. On M/T models, slowly release clutch. Locked rear wheel should remain stationary and free wheel should rotate slowly. As free wheel speed increases, differential should lock, causing both wheels to rotate or stop. If equipped with M/T, engine may stall.
- It may be necessary to accelerate to 10 MPH to lock differential. If speed increases beyond 20 MPH without locking differential, unit is defective. Lock opposite wheel and repeat test.
INSPECTION
Clean all parts in solvent. Inspect all bearings, gear teeth and clutch plates and discs for signs of wear or overheating. If reaction block or flange shims must be replaced, replace with components of identical size.
Clean all components in solvent. Inspect all bearings and gear teeth for excessive wear or damage. Inspect clutch plates and discs for overheating. If reaction blocks or flanges must be replaced, measure thickness of original components and replace with components of same size.