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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Automatic Transmission Flex Plate Replacement >> Installation Procedure

Installation Procedure

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NOTE:
  • The automatic transmission flex plate 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 automatic transmission flex plate bolts.
  • This procedure requires a three stage tightening process to properly seat the automatic transmission flex plate.
    Fig 1: Automatic Transmission Flex Plate, Bolts And Scuff Plate
    GM3260185Courtesy of GENERAL MOTORS COMPANY
  1. Install the automatic transmission flex plate (3), scuff plate (2), and NEW bolts (1) to the crankshaft. Hand tight only at this time.
    2. Fig 2: NEW Engine Flex Plate Bolts (With Tightening Sequence)
    GM2965656Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  2. Tighten the automatic transmission flex plate bolts using the following sequence:
    1. Tighten the engine flex plate bolts (1 - 8) a first pass in sequence to 15 N.m (11 lb ft).
    2. Tighten the engine flex plate bolts (1 - 8) a second pass in sequence to 30 N.m (22 lb ft).
    3. Tighten the engine flex plate bolts (1 - 8) a final pass in sequence an additional 45 degrees using EN-45059  angle meter.
  3. Install the automatic transmission. Refer to Transmission Replacement .
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