Hummer H2. Manual - part 863

8. Fill the rear axle with lubricant. Refer to Lubricant Replacement - Rear Drive Axle .  

9. Lower the vehicle.  

DRIVE PINION FLANGE/YOKE AND/OR OIL SEAL REPLACEMENT 

Tools Required 

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J 8614-01 Flange/Pulley Holding Tool  

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

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 and rotors. Refer to Brake Rotor Replacement - Rear in Disc Brakes. 

IMPORTANT: Observe and mark the positions of all the driveline components, relative 

to the propeller shaft and the axles, prior to disassembly. These 
components include the propeller shafts, drive axles, pinion flanges, 
output shafts, etc. Reassemble all the components in the exact places in 
which you removed the parts. Follow any specifications, torque values, 
and any measurements made prior to disassembly.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

Fig. 51: Rear Propeller Shaft & Rear Axle Pinion Yoke 
Courtesy of GENERAL MOTORS CORP. 

4. Reference mark the rear propeller shaft (3) to the rear axle pinion yoke (4).  

5. Disconnect the propeller shaft from the axle. 

Wrap the bearing caps with tape in order to prevent the loss of bearing rollers. 

Support the propeller shaft as necessary.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

Fig. 52: Measuring Pinion Rotation Torque 
Courtesy of GENERAL MOTORS CORP. 

6. Measure the amount of torque required to rotate the pinion. Use an inch-pound torque wrench. Record 

this measurement for reassembly. This will give the combined preload for the following components: 

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The pinion bearings  

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The pinion oil seal  

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The differential case bearings  

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The axle bearings  

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The axle seals  

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

Fig. 53: Aligning Marks On Pinion Yoke 
Courtesy of GENERAL MOTORS CORP. 

7. Place an alignment mark between the pinion and the pinion yoke. 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2