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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1770 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Shim Selection

Drive Pinion Shim Selection

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Inspect the press bar surface. Do not press the housing against a rough surface. Sealing surfaces could be damaged.
  1. Using the axle lube, lightly lubricate the bearing cup. Place J 44861  inside the race. See Special Tools . Using a press, install the race.
    2. Fig 1: View Of Drive Pinion Shim
    GM735160Courtesy of GENERAL MOTORS CORP.
  2. Inspect the race to ensure it is properly seated.
    3. Fig 2: Placing J44861 Inside Race
    GM735159Courtesy of GENERAL MOTORS CORP.
    NOTE: If dowel pins are still in the housing, remove them before pressing. Pressing on dowels will damage the housing.
  3. Using the axle lube, lightly lubricate the bearing race. Place J 44861  inside the race. Using a press, install the race. See Special Tools .
    4. Fig 3: Installing J44856-2
    GM792812Courtesy of GENERAL MOTORS CORP.
  4. Install J 44856-2  , see J 44856-3  and J 44856-4  on the pinion bearings (1) as shown. See Special Tools .
    5. Fig 4: Holding Shaft & Tighten
    GM792820Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
    IMPORTANT: Lightly lubricate the bearing rollers with the axle lube.
  5. Hold the shaft and tighten.

    Tighten:  Tighten the shaft nut to 1.7 N.m (15 lb in) rolling torque.

    6. Fig 5: Rotating Stud Assembly While Inspecting Rolling Torque
    GM792822Courtesy of GENERAL MOTORS CORP.
  6. Rotate the stud assembly while inspecting the rolling torque.
    7. Fig 6: Installing J44856-5
    GM792824Courtesy of GENERAL MOTORS CORP.
  7. Turn the housing over so that J 44856-3  (1) is up. See Special Tools .
  8. Install J 44856-5  (2) on the . See Special Tools .J 44856-1  (3) and place it in the differential bearing bores. See Special Tools .
    9. Fig 7: Installing J44856-9 Over Master Bearings
    GM792826Courtesy of GENERAL MOTORS CORP.
  9. Install the J 44856-9  over the master bearings using 2 (M10) rear cover bolts and snug tighten the bolts. See Special Tools .
    10. Fig 8: Installing Dial Indicator On Arbor Post
    GM796519Courtesy of GENERAL MOTORS CORP.
  10. Install the dial indicator on the arbor post.
  11. Rotate J 44856-1  so that the gage pin is not in contact with the . See Special Tools .J 44856-3  and zero the dial indicator. See Special Tools .
    12. Fig 9: Lifting Gage Pin & Rotate
    GM796520Courtesy of GENERAL MOTORS CORP.
  12. Lift the gage pin and rotate J 44856-1  . See Special Tools . Drop the gage pin onto J 44856-3  . See Special Tools .
  13. Rock the arbor back and forth slightly and record the maximum reading from the dial indicator.

    Subtract this measurement from 2.54 mm (0.100 in). This equals the shim thickness.

  14. Remove the pinion shimming tools.
    15. Fig 10: Using J35664 Position Pinion Shaft Into Press
    GM693606Courtesy of GENERAL MOTORS CORP.
  15. Using J 35664  , position the pinion shaft (3) into a press. See Special Tools . Install the determined shim (2) and bearing (1) on the shaft.
    16. Fig 11: Pinion Shaft, Collapsible Spacer & Bearing
    GM735161Courtesy of GENERAL MOTORS CORP.
  16. Install the pinion shaft (4), the new collapsible spacer (3), and the bearing (1) into the differential housing (2).
    17. Fig 12: Installing Differential Housing On J35664
    GM693600Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not over-press the bearing on the shaft. This could pre-crush the collapsible spacer.
    IMPORTANT: The rear face of the pinion shaft must be supported in order to install the pinion shaft and bearing.
  17. Position the pinion shaft and the differential housing into a press in order to press the bearing on the shaft using J 35664  . See Special Tools .
    18. Fig 13: Installing Differential Housing On J44869 Using 4 Clutch Cover Bolts
    GM1547599Courtesy of GENERAL MOTORS CORP.
  18. Install the differential housing on the J 44869  using 4 clutch cover bolts (1). See Special Tools .
    19. Fig 14: Installing Pinion Nut On The Pinion Shaft
    GM1547604Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The pinion nut is left-hand threaded.
  19. Install a new pinion nut on the pinion shaft. Place the J 44864  (1) over the pinion shaft (1). See Special Tools . Turn the pinion shaft by hand to align the hex nut and the J 44864  to the flats of the . See Special Tools .J 44869  (2). See Special Tools .
    20. Fig 15: Placing J44865 & Breaker Bar Over Pinion Splines
    GM1547603Courtesy of GENERAL MOTORS CORP.
  20. Place J 44865  (1) and the breaker bar over the splines on the pinion shaft. See Special Tools .
  21. Tighten the nut in the left-handed direction in small increments, as needed, to apply bearing preload.
    22. Fig 16: Removing J44864
    GM1547597Courtesy of GENERAL MOTORS CORP.
  22. Remove J 44864  . See Special Tools . Place the J 44865  on a needle type torque wrench. See Special Tools . Rotate the shaft, inspecting the rolling torque.

    Tighten:  Tighten the shaft to 1.7 N.m (15 lb in).

    23. Fig 17: Using Punch To Stake Nut On Pinion Shaft Flats
    GM792830Courtesy of GENERAL MOTORS CORP.
  23. When the rolling torque is reached, use a punch to stake the nut on the pinion shaft flats.
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