General Information

Before attempting any service procedures, the technician must know what type rear axle is to be serviced. Refer to the "REAR AXLE USAGE CHART." to identify RPO codes, differential ring gear-diameter, and ratios. Also, refer to the service parts identification label on the vehicle.

Most rear axle service repairs can be made with the vehicle properly supported and the rear axle housing lowered to its lowest travel. On some vehicles, it may be necessary to disconnect the shock absorbers to obtain additional clearance. When doing this, do not allow the rear brake hoses to become kinked or stretched.

Lubricant may be drained by removing all rear axle housing cover bolts/screws and breaking the rear axle housing cover loose at the bottom.

If the rear axle housing is removed for any reason, rear axle service can be performed on the bench.

When a new differential ring gear and differential drive pinion gear are installed, the owner should be advised not to accelerate rapidly or exceed 80 km/h (50 mph) for the first 80 km (50 miles) of driving.