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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1014 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6 Inch Axle w/Drum Brakes) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Pinion Oil Seal
    GM1483208Courtesy of GENERAL MOTORS CORP.
  1. Install a new pinion oil seal using the J 22388  . See Special Tools .
    2. Fig 2: Pinion Nut And Washer
    GM1483204Courtesy of GENERAL MOTORS CORP.
  2. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the splines of the pinion yoke.
  3. Install the pinion yoke. Align the marks made during removal.
    4. NOTE: Refer to Pinion Flange/Yoke Installation Notice .
  4. Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.
  5. Install the washer and a NEW pinion nut.
    6. Fig 3: Holding Pinion Yoke With Special Tool
    GM661080Courtesy of GENERAL MOTORS CORP.
  6. Install the J 8614-01  onto the pinion yoke as shown.
    7. 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.
  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. 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. Fig 5: Identifying Driveshaft Pinion, Yoke Retainers & Bolts
    GM361391Courtesy of GENERAL MOTORS CORP.
  10. Install the propeller shaft (3) to the pinion yoke (4).

    Align the reference marks made during removal.

  11. Install the propeller shaft yoke retaining clamps and the bolts.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  12. Inspect and add axle lubricant to the axle housing, if necessary. Refer to Rear Axle Lubricant Level Inspection (11.5 Inch Axle)  or Rear Axle Lubricant Level Inspection (8.6, 9.5 LD Axle)  or Rear Axle Lubricant Level Inspection (10.5 Inch Axle) .
  13. Lower the vehicle.
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