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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) >> Removal Procedure

Removal 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.
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.
    Fig 1: Identifying Driveshaft Pinion, Yoke Retainers & Bolts
    GM361391Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Reference mark the rear propeller shaft (3) to the rear axle pinion yoke (4).
  3. 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.

    4. Fig 2: Measuring Pinion Rotating Torque
    GM661077Courtesy of GENERAL MOTORS CORP.
  4. Using an inch-pound torque wrench, measure the amount of torque required to rotate the pinion. 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 bearings
    • The axle seals
    5. Fig 3: View Of Pinion Shaft & Pinion Yoke Alignment Marks
    GM788905Courtesy of GENERAL MOTORS CORP.
  5. Place an alignment mark between the pinion and the pinion yoke.
    6. Fig 4: Holding Pinion Yoke With Special Tool
    GM661080Courtesy of GENERAL MOTORS CORP.
  6. Install the J 8614-01  as shown.
  7. While holding the J 8614-01  , loosen the pinion nut.
  8. Remove the washer.
    9. Fig 5: Pinion Nut And Washer
    GM1483204Courtesy of GENERAL MOTORS CORP.
  9. Remove the pinion nut and washer.
    10. Fig 6: Holding Pinion Yoke With Special Tool
    GM661074Courtesy of GENERAL MOTORS CORP.
  10. Install the J 8614-2 (2) and the J 8614-3 (3) into the J 8614-01  (1) as shown.
  11. Remove the pinion yoke by turning the J 8614-3 (3) clockwise while holding the J 8614-01  (1).

    Use a container in order to retrieve the lubricant.

    12. Fig 7: View Of Pinion Oil Seal
    GM1483208Courtesy of GENERAL MOTORS CORP.
  12. Remove the pinion oil seal. Use a suitable seal removal tool. Do not damage the housing.
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