GM Service Manual Online
For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 2004 🢒 Tahoe - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 1-2-3-4 Clutch Backing Plate Inspection

    Object Number: 1217132 Size: SH

    Important: Measure as described below at a minimum of 3 locations. Replace the 1-2-3-4 clutch backing plate if the specifications are not met.

  1. Measure the wear surface thickness of the 1-2-3-4 clutch backing plate (1) at dimension A for minimum thickness.
  2. Refer to the 1-2-3-4 clutch backing plate table in Selective Components Specifications for the correct size backing plate.

    3. Object Number: 1217134 Size: SH

    Important: Check the backing plate for coning on a level surface.

  3. Measure the cone of the 1-2-3-4 clutch backing plate (1) at dimension A.
  4. Replace the backing plate (1) if any cone is measured.