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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (3 Of 5)) >> On-Vehicle Repair Instructions (2 Of 2) >> Automatic Transmission Flex Plate Replacement >> Installation Procedure

Installation Procedure

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IMPORTANT:
  • The flywheel does not use a locating pin for alignment and will not initially seat against the crankshaft flange or spacer, if applicable, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process.
  • Certain applications (6.0L) require a spacer and longer bolts for proper flywheel position.
    Fig 1: View Of Spacer & Crankshaft Rear
    GM642276Courtesy of GENERAL MOTORS CORP.
  1. Install the spacer, if applicable, onto the rear of the crankshaft.
    2. Fig 2: View Of Engine Flywheel & Bolts
    GM832979Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Longer flywheel bolts must be used on applications using a flywheel spacer.
  2. Install the flywheel and bolts to the crankshaft.
  3. Apply threadlock to the threads of the flywheel bolts. Refer to Sealers, Adhesives, and Lubricants for the correct part number.
    4. Fig 3: Identifying Flywheel Bolt Tightening Sequence
    GM63174Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  4. Tighten the flywheel bolts.

    Tighten: 

    1. Tighten the bolts (1-6) a first pass in sequence to 20 N.m (15 lb ft).
    2. Tighten the bolts (1-6) a second pass in sequence to 50 N.m (37 lb ft).
    3. Tighten the bolts (1-6) a final pass in sequence to 100 N.m (74 lb ft).

  5. Install the automatic transmission. Refer to Transmission Replacement for the 4L60-E or Transmission Replacement for the 4L80-E.
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