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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement >> Removal Procedure

Removal Procedure

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    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.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drain the drive axle. Refer to Lubricant Replacement - Rear Drive Axle (8.6 Inch Axle)  or Lubricant Replacement - Rear Drive Axle (9.5 Inch LD Axle)  or Lubricant Replacement - Rear Drive Axle (9.5 Inch HD Axle) .
  3. Remove the tires and wheels (8.6 inch, 9.5 inch axle). Refer to Tire and Wheel Removal and Installation .
  4. Remove the rear brake calipers (8.6 inch, 9.5 inch axle). Refer to Rear Brake Caliper Replacement (1500 Series) or Rear Brake Caliper Replacement (2500 Series) .
  5. Remove the brake rotors (8.6 inch, 9.5 inch axle). Refer to Rear Brake Rotor Replacement (1500 Series) or Rear Brake Rotor Replacement (2500 Series) .
    6. Fig 1: Identifying Driveshaft Pinion, Yoke Retainers & Bolts
    GM361391Courtesy of GENERAL MOTORS CORP.
  6. Reference mark the rear propeller shaft (3) to the rear axle pinion yoke (4).
  7. 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.
    8. Fig 2: Measuring Pinion Rotating Torque
    GM661077Courtesy of GENERAL MOTORS CORP.
  8. 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:
    • The pinion bearings
    • The pinion oil seal
    • The differential case bearings
    • The axle bearing (8.6 inch, 9.5 inch axles)
    9. Fig 3: View Of Pinion Shaft & Pinion Yoke Alignment Marks
    GM788905Courtesy of GENERAL MOTORS CORP.
  9. Place an alignment mark between the pinion and the pinion yoke.
    10. Fig 4: Holding Pinion Yoke With Special Tool
    GM661080Courtesy of GENERAL MOTORS CORP.
  10. Install the J 8614-01  as shown.
  11. Remove the pinion nut while holding the J 8614-01  .
  12. Remove the washer.
    13. Fig 5: Holding Pinion Yoke With Special Tool
    GM661074Courtesy of GENERAL MOTORS CORP.
  13. Install the J 8614-2 (2) and J 8614-3 (3) into the J 8614-01  (1) as shown.
  14. Remove the pinion yoke by turning the J 8614-3 (3) clockwise in order to retrieve the lubricant.
  15. Remove the pinion oil seal. Use a suitable seal removal tool.
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