Chevrolet Silverado / GMC Sierra. Service manual — part 1368

Excessive wear

3. Inspect the pinion gear splines for wear.

4. Inspect the pinion flange splines for wear.

5. Inspect the fit of the pinion flange on the pinion gear.

6. Inspect the sealing surface of the pinion flange for nicks, burrs, or rough tool marks which

will damage the inside diameter of the pinion seal and result in an oil leak.

7. Inspect all of the parts for wear and replace as necessary.

THRUST WASHERS, SHIMS, AND ADJUSTER SLEEVES INSPECTION

1. Inspect the shims and the thrust washers for cracks and chips.

The damaged shims should be replaced with an equally sized service shim.

2. Inspect the adjuster sleeves for damaged threads. Replace if required.

DIFFERENTIAL CASE ASSEMBLY ASSEMBLE (8.25 INCH AXLE)

Tools Required

J 8092 Universal Driver Handle - 3/4 in - 10

J 22761 Differential Side Bearing Installer. See Special Tools.

J 22888-D Side Bearing Remover Kit. See Special Tools.

Assemble

1. Lubricate the pinion and side gears using axle lubricant. Use the correct fluid. Refer to

Sealers, Adhesives, and Lubricants.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 173: Differential Side Gears & Thrust Washers
Courtesy of GENERAL MOTORS CORP.

2. Install the thrust washers and the differential side gears into the differential case.

If the same differential side gears and the thrust washers are being used, install the gears and
the washers to the original locations.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 174: Identifying Differential Pinion Gears & Thrust Washers
Courtesy of GENERAL MOTORS CORP.

3. Install the differential pinion gears by performing the following steps:

1. Position both pinion gears between the differential side gears directly opposite of each

other.

2. Rotate the differential side gears until the pinion gears are opposite the opening in the

differential case in line with the pinion shaft opening.

4. Install the thrust washers.

Rotate the pinion gears toward the differential case opening in order to permit the sliding in
of the thrust washers.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 175: View Of Differential And Pinion Shaft
Courtesy of GENERAL MOTORS CORP.

5. Install the pinion gear shaft.

6. Install the new pinion gear shaft lock pin using a hammer and a brass drift.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado