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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Automatic Transmission Flex Plate Replacement >> Installation Procedure

Installation Procedure

NOTE:
  • 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 (4.8L manual transmissions or all 6.0L) require a spacer and longer bolts for proper flywheel position.
    Fig 1: View Of Spacer & Crankshaft Rear
    GM642276Courtesy of GENERAL MOTORS COMPANY
  1. Install the spacer (if applicable) onto the rear of the crankshaft.
    2. Fig 2: View Of Engine Flywheel & Bolt
    GM178458Courtesy of GENERAL MOTORS COMPANY
  2. Install the automatic transmission engine flywheel to the crankshaft.
    3. NOTE:

    Longer flywheel bolts must be used on applications using a flywheel spacer.

  3. Apply threadlock to the threads of the flywheel bolts. Refer to Adhesives, Fluids, Lubricants and Sealers for the correct part number.
    4. Fig 3: Identifying Flywheel Bolt Tightening Sequence
    GM63174Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  4. Install the engine flywheel bolts.
    1. Tighten the engine flywheel bolts a first pass in sequence to 20 N.m (15 lb ft).
    2. Tighten the engine flywheel bolts a second pass in sequence to 50 N.m (37 lb ft).
    3. Tighten the engine flywheel bolts 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 transmission or Transmission Replacement for the 6L45/6L50/6L80/6L90 transmission.
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