Chevrolet Silverado / GMC Sierra. Service manual — part 1439

9. Apply sealant, GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the splines

of the pinion yoke.

10. Install the pinion yoke.

Align the marks made during removal.

11. Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few

pinion shaft threads show through the yoke.

12. Install the washer and a new pinion nut.

NOTE:

Do not hammer the pinion flange/yoke onto the pinion shaft.
Pinion components may be damaged if the pinion flange/yoke
is hammered onto the pinion shaft.

2008 Chevrolet Silverado 1500

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

Fig. 144: Installing J 8614-01 To Pinion Yoke
Courtesy of GENERAL MOTORS CORP.

13. Install the J 8614-01 onto the pinion yoke as shown.

14. Tighten the pinion nut while holding the J 8614-01 .

NOTE:

Refer to Fastener Notice .

IMPORTANT: If the rotating torque is exceeded, the pinion will have to be

removed and a new collapsible spacer installed.

2008 Chevrolet Silverado 1500

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

Tighten: Tighten the nut until the pinion end play is just taken up. Rotate the pinion while
tightening the nut to seat the bearings.

Fig. 145: Measuring Pinion Rotating Torque
Courtesy of GENERAL MOTORS CORP.

15. Measure the rotating torque of the pinion. Compare this measurement with the rotating

torque recorded during removal.

Tighten: Tighten the nut in small increments, as needed, until the rotating torque is 0.40-
0.57 N.m (3-5 lb in) greater than the rotating torque recorded during removal.

16. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings

have seated. Recheck the rotating torque and adjust if necessary.

17. Determine the selective shim thickness for the pinion gear bearing retainer. Refer to Pinion

Depth Adjustment (10.5 Inch Axle) or Pinion Depth Adjustment (8.6, 9.5/9.5LD, and
11.5 Inch Axles).

2008 Chevrolet Silverado 1500

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

Fig. 146: Pinion Gear Bearing Retainer
Courtesy of GENERAL MOTORS CORP.

18. Apply sealant, GM P/N 1052942 (Canadian P/N 10953466) or equivalent, to sealing

surface of the pinion gear bearing retainer.

19. Install the selective shim.

Align the tab on the shim with the unmachined surface of the pinion gear bearing retainer.

20. Apply sealant, GM P/N 1052942 (Canadian P/N 10953466) or equivalent, to surface of the

selective shim.

21. Install the pinion gear bearing retainer.

2008 Chevrolet Silverado 1500

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