Hummer H2. Manual — part 872

Fig. 84: Differential Case & Axle Housing
Courtesy of GENERAL MOTORS CORP.

4. Install the differential assembly into the axle housing by performing the following steps:

1. Position the locking differential coil assembly wiring harness towards the rear axle housing cover,

parallel to the drive pinion.

2. Place the case, with the bearing cups installed, into the axle housing.

Support the case in order to keep the case from falling out of the axle housing.

3. If the differential assembly cannot be installed, turn the differential side bearing adjuster nut into

the axle housing until the differential assembly can be installed.

4. Route the wiring of the locking differential coil assembly away from the left side differential

bearing cap mounting surface.

2004 Hummer H2

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

Fig. 85: Identifying Bearing Cap Bolt
Courtesy of GENERAL MOTORS CORP.

5. Install the bearing caps and the bolts.

Do not torque the bearing cap bolts at this time.

6. Adjust the differential side bearing preload. Refer to Differential Side Bearing Preload Adjustment .

7. Adjust the backlash. Refer to Backlash Adjustment .

8. Once backlash and bearing preload is correct, perform a gear tooth contact pattern check in order to

ensure proper alignment between the ring and pinion gears. Refer to Gear Tooth Contact Pattern
Inspection .

2004 Hummer H2

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

Fig. 86: Left Side Differential Bearing Bolts
Courtesy of GENERAL MOTORS CORP.

9. Remove the left side bearing cap bolts.

10. Remove the left side bearing cap.

11. Rotate the locking differential coil assembly wiring harness towards the top of the axle housing in order

to align the locking differential coil assembly lock tab with the top of the differential bearing cap.

2004 Hummer H2

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

Fig. 87: Locking Differential Coil Assembly Wiring From Axle Housing
Courtesy of GENERAL MOTORS CORP.

12. Install the locking differential coil assembly wiring through the axle housing opening.

Push the wiring grommet through the axle housing opening until fully seated.

2004 Hummer H2

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2