GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Transmission 🢒 Automatic Transmission - Allison 🢒 Low and Reverse Clutch Plate Inspection

    Object Number: 1217956 Size: SH

    Important: 

       • Perform the following measurements at 3 or more locations.
       • Check the plates for coning on a level surface.
       • Replace any parts not meeting specifications.

  1. Measure the thickness of each low and reverse clutch fiber plate (1) at dimension A.

    2. Specification
    The low and reverse clutch fiber plate minimum thickness is 2.375 mm (0.0935 in).

  2. Measure the oil groove depth of each low and reverse clutch fiber plate (1) at dimension B.

    3. Specification
    The low and reverse clutch fiber plate minimum groove depth is 0.200 mm (0.0079 in).


    Object Number: 1217435 Size: SH
  3. Measure the cone of each low and reverse clutch fiber plate (1) at dimension A.

    4. Specification
    The low and reverse clutch fiber plate maximum cone is 0.225 mm (0.0089 in).


    Object Number: 1217224 Size: SH
  4. Measure the thickness of each low and reverse clutch steel plate (1) at dimension A.
  5. The minimum thickness is listed in Selective Components Specifications .