Chevrolet Silverado / GMC Sierra. Service manual — part 1485

Increase
backlash.

Desirable

Pattern -

Drive pattern

should be

centered on

tooth

Desirable

Pattern -

Coast pattern

should be

center to

slightly toe on

tooth

No correction
required.

Top Toe

Contact

Top Heel

Contact

Backlash
correct.
Increase in
pinion shim.

Root Heel

Contact

Root Toe

Contact

Backlash
correct.
Decrease in
pinion shim.

Top Heel

Contact

Top Toe

Contact

Pinion shim
correct.
Decrease
backlash.

2008 Chevrolet Silverado 1500

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

Root Toe

Contact

Root Heel

Contact

Pinion shim
correct.
Increase
backlash.

Face Milling

Desirable

Pattern -

Drive pattern

should be

centered on

tooth

Desirable

Pattern -

Coast pattern

should be

center to

slightly toe on

tooth

No correction
required.

Top and

Slightly Heel

Contact

Top and

Slightly Toe

Contact

Backlash
correct.
Increase in
pinion shim.

Root and

Slightly Toe

Contact

Root and

Slightly Heel

Contact

Backlash
correct.
Decrease in
pinion shim.

2008 Chevrolet Silverado 1500

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

LOCKING DIFFERENTIAL DISASSEMBLE (8.6, 9.5LD AXLES)

Tools Required

J 26252 Locking Differential Governor Remover. See Special Tools.

Disassemble

1. Remove the ring gear, if necessary. Refer to Drive Pinion and Ring Gear Replacement

(8.6, 9.5/9.5LD, and 11.5 Inch Axles) or Drive Pinion and Ring Gear Replacement
(10.5 Inch Axle).

Heel Contact

Toe Contact Pinion shim

correct.
Decrease
backlash.

2008 Chevrolet Silverado 1500

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

Fig. 270: Removing Governor Bushing
Courtesy of GENERAL MOTORS CORP.

2. Remove the governor bushing using the J 26252 . See Special Tools.

3. Remove the governor assembly.

2008 Chevrolet Silverado 1500

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