GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 1-2-3-4 Clutch Fiber Plate Inspection

    Object Number: 1217091 Size: SH

    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.

    2. 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.

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

    Important: Check the plates for coning on a level surface.

  3. Measure the cone of each plate (1) at dimension A.

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