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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Manual Transmission - AISIN AY6) >> Repair Instructions - On Vehicle >> Mainshaft Rear Oil Seal Replacement >> 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 . Using J 29873  tighten the output flange nut. See Special Tools . Tighten until the looseness is minimal.
    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 seat the 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. NOTE: Refer to Fastener Notice .
  11. Tighten the nut.

    Tighten:  Tighten the nut to 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 rotational torque 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 the steps above.
  18. At the correct location, stake the drive flange nut.
  19. Install the propeller shaft. Refer to Rear Propeller Shaft Replacement (RWD) or Rear Propeller Shaft Replacement (AWD) .
  20. Lower the vehicle.
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