Hummer H3. Manual — part 1027

3. Install the differential side gear into the bell-end of the differential case.

Fig. 152: Identifying Differential Pinion Gears & Thrust Washers
Courtesy of GENERAL MOTORS CORP.

4. Install the differential pinion gears by doing the following:

1. Position both pinion gears and each thrust washer into each side of the differential

window.

Place the pinion gears 180 degrees across from each other.

2. Rotate the differential side gears until both pinion gears are directly opposite the

opening in the differential case.

Line up the pinion shaft opening in each of the pinion gears with the pinion shaft
opening in the differential case.

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Fig. 153: View Of Differential And Pinion Shaft
Courtesy of GENERAL MOTORS CORP.

5. Install the pinion shaft.

6. If the pinion shaft cannot be installed, remove the pinion gears and thrust washers, the

locking differential side gear and differential thrust washer.

7. Install a smaller differential side thrust washer and re-install the locking differential side

gear, the pinion gears and thrust washers and the pinion shaft.

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Fig. 154: View Of Pinion Shaft Lock Bolt
Courtesy of GENERAL MOTORS CORP.

8. Install the pinion shaft lock bolt.

Do not torque the pinion shaft lock bolt at this time.

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Fig. 155: Measuring Backlash Of Pinion Gear Closest To Pinion Shaft Lock Bolt &
Differential Side Gear
Courtesy of GENERAL MOTORS CORP.

9. Measure the backlash of the pinion gear closest to the pinion shaft lock bolt and the

differential side gear by doing the following:

1. Rotate the pinion gear so that one of the teeth is perpendicular to the ring gear flange.

2. Install a brass drift between the locking differential side gear and the pinion shaft in

order to prevent the side gear from moving.

3. Install the J 7872 (1) to the ring gear flange. See Special Tools.

4. Loosely clamp the J 7872-2 (2) and the J 8001-3 (3) onto the stem on the J 7872 (1).

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3