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Preload Adjustment Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Tightening Propshaft Flange Nut
    GM2400434Courtesy of GENERAL MOTORS CORP.
  1. Shift the transmission into any gear.
  2. Attach J 45012:  holder to the propshaft flange.
  3. Use J 45012:  holder in order to prevent the propshaft flange from rotating. Install and tighten the propshaft flange nut. Tighten until the looseness is minimum.
    4. Fig 2: Shaking Propshaft
    GM2400436Courtesy of GENERAL MOTORS CORP.
  4. Verify looseness by shaking the propshaft longitudinally.
    5. Fig 3: Measuring Rotational Torque/Drag Torque Of Propshaft Flange
    GM2400440Courtesy of GENERAL MOTORS CORP.
  5. Remove J 45012:  holder from the propshaft flange.
  6. Shift the transmission into NEUTRAL.
  7. Rotate the propshaft flange several times in order to break in the gears, synchronizers and bearings.
  8. Measure the rotational torque/drag torque of the propshaft flange by using a suitable tool. Record this initial rotational torque measurement as value A.
    9. Fig 4: Tightening Propshaft Flange Nut
    GM2400434Courtesy of GENERAL MOTORS CORP.
  9. Attach J 45012:  holder to the propshaft flange.
  10. Shift the transmission into any gear.
  11. Tighten the nut 220-565 N.m (162-417 lb ft).
  12. Remove the J 45012:  holder from the propshaft flange.
  13. Shift the transmission into NEUTRAL.
  14. Rotate the propshaft flange several times in order to seat the bearings.
  15. Measure the rotational torque/drag torque of the propshaft flange by using a suitable tool. Record this measurement as value B.
  16. Subtract value A from value B. Verify that the resulting measurement is within the specified range.

    Specification:  The rotational torque specification is 0.45-1.35 N.m (4-12 lb in).

  17. Repeat the previous steps until you have confirmed that the rotational torque specification is reached then stake the nut in place. If the rotational torque requirement has been exceeded, replace the spacer and repeat steps 2-16.
    18. Fig 5: Output Sensor & Bolt
    GM2400393Courtesy of GENERAL MOTORS CORP.
  18. Install the output sensor (213) and bolt (215) into the rear extension housing and tighten to 8 N.m (71 lb in).
    19. Fig 6: Identifying Backup Lamp Switch & Washer
    GM1921436Courtesy of GENERAL MOTORS CORP.
  19. Install a NEW backup lamp washer (208) and switch into the case. Tighten the switch to 44 N.m (32 lb ft).
    20. Fig 7: Identifying Fill Plug, Drain Plug & Washers
    GM1921433Courtesy of GENERAL MOTORS CORP.
  20. Install the NEW gaskets (33), drain plug (34) and fill plug (79). Tighten both plugs to 37 N.m (27 lb ft).
  21. Install the clutch release cylinder and the clutch release cylinder bolts. Refer to Clutch Concentric Actuator Cylinder Replacement (Aisin) or Clutch Concentric Actuator Cylinder Replacement (Tremec) .
    22. Fig 8: Transmission Mounting Fixture & Adapters
    GM2400381Courtesy of GENERAL MOTORS CORP.
  22. Remove the DT-47678:  fixture (2) and J 3289-20:  fixture (1) from the transmission clutch housing.
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