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Automatic Transmission Flex Plate Installation

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Flex Plate And Bolts
    GM1658140Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The flex plate does not use a locating pin for alignment and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flex plate bolts. This procedure requires a 3 stage tightening process.

  1. Install the flex plate to the crankshaft.
  2. Apply threadlock to the threads of the flex plate bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers 
    3. Fig 2: Identifying Flex Plate Bolt Tightening Sequence
    GM63174Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

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