Hummer H2. Manual - part 867

3. Tighten the ring gear bolts alternately and in stages, gradually pulling the ring gear onto the differential 

case. 

Tighten: Tighten the ring gear bolts in sequence to 140 N.m (103 lb ft). 

4. Install the pinion bearing cups. Refer to Drive Pinion Bearings Replacement .  

5. Determine the selective shim thickness for the pinion gear. Refer to Pinion Depth Adjustment .  

6. Install the selective shim onto the drive pinion.  

7. Install the inner pinion bearing to the pinion. Refer to Drive Pinion Bearings Replacement . 

Fig. 66: Collapsible Spacer From Pinion 
Courtesy of GENERAL MOTORS CORP. 

8. Install a new collapsible spacer.  

9. Lubricate the pinion bearings with axle lubricant. Use the proper fluid. Refer to Fluid and Lubricant 

Recommendations in Maintenance and Lubrication.  

10. Install the drive pinion into the axle housing.  

11. Install the outer pinion bearing onto the drive pinion. 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

Fig. 67: Installing New Pinion Oil Seal Using J 22388 
Courtesy of GENERAL MOTORS CORP. 

12. Install a new pinion oil seal using the J 22388 . See Special Tools and Equipment .  

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

yoke.  

14. Install the pinion yoke. 

15. 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.  

16. Install the washer and a new pinion nut.  

17. Install the J 8614-01 onto the pinion yoke. 

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.

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

a new collapsible spacer installed.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

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

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. 68: Measuring Pinion Rotation Torque 
Courtesy of GENERAL MOTORS CORP. 

19. Measure the rotating torque of the drive pinion using an inch-pound torque wrench. 

Specification: The rotating torque of the drive pinion should be 1.7-3.4 N.m (15-30 lb in) for new 
bearings or 1.1-2.3 N.m (10-20 lb in) for used bearings. 

20. If the rotating torque of the drive pinion is less than 1.7 N.m (15 lb in) for new bearings or 1.1 N.m (10 lb 

in) for used bearings, continue to tighten the pinion nut until the specified torque is obtained. 

Rotate the pinion several times to ensure the bearings have seated. Recheck the rotating torque and adjust 
if necessary. 

21. If the rotating torque of the drive pinion is greater than 3.4 N.m (30 lb in) new bearings or 2.3 N.m (20 lb 

in) for used bearings, remove the drive pinion and replace the collapsible spacer and re-install the drive 
pinion following the steps above.  

22. Install the differential assembly. Refer to Differential Replacement . 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

23. Perform a gear tooth contact pattern check on the drive pinion and the ring gear. Refer to Gear Tooth 

Contact Pattern Inspection .  

24. Install the axle shafts. Refer to Rear Axle Shaft Replacement .  

25. Install the brake rotors. Refer to Brake Rotor Replacement - Rear in Disc Brakes.  

26. Install the brake calipers. Refer to Brake Caliper Replacement - Rear in Disc Brakes.  

27. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and 

Wheels.  

28. Fill the axle with lubricant. Use the proper fluid. Refer to Lubricant Replacement - Rear Drive Axle .  

29. Lower the vehicle.  

DRIVE PINION BEARINGS REPLACEMENT 

Tools Required 

z

J 7818 Inner Bearing Race Installer. See Special Tools and Equipment .  

z

J 8092 Driver Handle  

z

J 22306 Rear Pinion Cup Bearing Installer. See Special Tools and Equipment .  

z

J 22388 Pinion Oil Seal Installer - Rear. See Special Tools and Equipment .  

z

J 22912-01 Split Plate Bearing Puller  

z

J 36614 Inner Pinion Bearing Installer  

Removal Procedure 

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

2. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and 

Wheels.  

3. Remove the brake calipers. Refer to Brake Caliper Replacement - Rear in Disc Brakes.  

4. Remove the brake rotors. Refer to Brake Rotor Replacement - Rear in Disc Brakes.  

5. Remove the axle shafts. Refer to Rear Axle Shaft Replacement .  

6. Remove the differential. Refer to Differential Replacement .  

7. Remove the drive pinion from the axle. Refer to Drive Pinion and Ring Gear Replacement . 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2