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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6 Inch Axle) >> Installation Procedure

Installation Procedure

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    Fig 1: Installing New Pinion Oil Seal
    GM889108Courtesy of GENERAL MOTORS CORP.
  1. Using the J 22388  , install the NEW oil seal. See Special Tools .
    2. Fig 2: View Of Pinion Shaft & Pinion Yoke Alignment Marks
    GM788905Courtesy of GENERAL MOTORS CORP.
  2. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the splines of the pinion flange/yoke.
  3. Align the reference marks on the drive pinion and the flange during the drive flange removal.
    4. NOTE: Refer to Pinion Flange/Yoke Installation Notice .
  4. Using a soft-faced hammer, seat the pinion flange/yoke onto the pinion shaft by tapping it with a until a few pinion shaft threads show through the flange/yoke.
  5. Install the washer and a NEW pinion nut.
    6. Fig 3: Holding Pinion Yoke With Special Tool
    GM661080Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
    IMPORTANT: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
  6. Using the J 8614-01  , tighten the drive pinion nut.
  7. 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.

    8. Fig 4: Measuring Pinion Rotating Torque
    GM661077Courtesy of GENERAL MOTORS CORP.
  8. Using a inch pound torque wrench, measure the rotating torque of the pinion. Compare this measurement with the rotating torque recorded during removal.

    Tighten:  Tighten the nut in small increments, as needed, until the rotating torque is 0.40-0.57 N.m (3-5 lb in) greater than the rotating torque recorded during removal.

  9. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated. Recheck the rotating torque and adjust if necessary.
  10. Install rear propeller shaft. Refer to Rear Propeller Shaft Replacement .
  11. Inspect and add axle lubricant to the axle housing, if necessary. Refer to Rear Axle Lubricant Level Inspection (8.6 Inch Axle)  or Rear Axle Lubricant Level Inspection (9.5 Inch LD Axle) .
  12. Remove the support and lower the vehicle.
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