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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Manual Transmission - AISIN AY6) >> Repair Instructions - Off Vehicle >> Transmission Assemble >> Preload Adjustment Procedure

Preload Adjustment Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View of DT-48636 and J 29873
    GM1921488Courtesy of GENERAL MOTORS CORP.
  1. Shift the transmission into any gear.
  2. Attach DT-48636  to the output flange. See Special Tools .
  3. Hold DT-48636  in order to prevent the output flange from rotating. See Special Tools . Install and tighten the output flange nut. Tighten until the looseness is minimum.
    4. Fig 2: View Of Output Shaft
    GM1921489Courtesy of GENERAL MOTORS CORP.
  4. Verify looseness by shaking the output shaft longitudinally.
    5. Fig 3: View Of DT-48636 and Output Flange
    GM1921490Courtesy of GENERAL MOTORS CORP.
  5. Remove DT-48636  from the output flange. See Special Tools .
  6. Shift the transmission into NEUTRAL.
  7. Rotate the output flange several times in order to break in the gears, synchronizers and bearings.
  8. Measure the rotational torque/drag torque of the output flange by using a suitable tool. Record this initial rotational torque measurement as value A.
    9. Fig 4: View of DT-48636 and J 29873
    GM1921488Courtesy of GENERAL MOTORS CORP.
  9. Attach DT-48636  to the output flange. See Special Tools .
  10. Shift the transmission into any gear.
  11. Tighten the nut.

    Tighten:  Tighten the nut 220-565 N.m (162-417 lb ft).

  12. Remove the DT-48636  from the output flange. See Special Tools .
  13. Shift the transmission into NEUTRAL.
  14. Rotate the output flange several times in order to seat the bearings.
  15. Measure the rotational torque/drag torque of the output 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 .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 (191) and repeat steps 2-16.
    18. Fig 5: View Of Output Sensor And Bolt
    GM1921440Courtesy of GENERAL MOTORS CORP.
  18. Install the output sensor (213) and bolt (215) into the rear extension housing.

    Tighten:  Tighten the bolt to 8 N.m (71 lb in).

    19. Fig 6: Identifying Backup Lamp Switch And Washer
    GM1921436Courtesy of GENERAL MOTORS CORP.
  19. Install a NEW backup lamp washer (208) and switch into the case.

    Tighten:  Tighten the switch to 44 N.m (32 lb ft).

    20. Fig 7: Identifying Fill Plug, Drain Plug And Washer
    GM1921433Courtesy of GENERAL MOTORS CORP.
  20. Install the NEW gaskets (33), drain plug (34) and fill plug (79).

    Tighten:  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 (CTS) .
    22. Fig 8: View Of DT-47678 And Transmission Clutch Housing
    GM1921421Courtesy of GENERAL MOTORS CORP.
  22. Remove the DT-47678  (2) and J 3289-20  (1) from the transmission clutch housing. See Special Tools .
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