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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1741 (Automatic Transmission - ALLISON - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> 1-2-3-4 Clutch Fiber Plate Inspection

1-2-3-4 Clutch Fiber Plate Inspection

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    Fig 1: Checking Thickness & Oil Groove Depth On 1-2-3-4 Clutch Fiber Plate
    GM1217091Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Measure as described below at a minimum of 3 locations.
    • Replace any 1-2-3-4 clutch fiber plate that does not meet specifications.
  1. Measure the thickness of each 1-2-3-4 clutch fiber plate (1) at dimension A.

    Specification:  The 1-2-3-4 clutch friction plate minimum thickness is 2.375 mm (0.093 in).

  2. Measure the oil groove depth of each plate at dimension B.

    Specification:  The oil groove minimum depth is 0.200 mm (0.0079 in).

  3. IMPORTANT: Check the plates for coning on a level surface.
  4. Measure the cone of each plate (1) at dimension A.

    Friction Plate Cone:  The fiber plate maximum cone is 0.255 mm (0.010 in).