GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Transmission 🢒 Automatic Transmission - Allison 🢒 Two-Wheel-Drive Low and Reverse Clutch Housing Spacer Measurement

    Object Number: 1216904 Size: SH
  1. Position the transmission case so that the rear of the case is facing up.
  2. At dimension A, measure the distance from the rear face of the low and reverse clutch housing (1) to the rear face of output speed sensor (OSS) reluctor wheel (2).

    3. Object Number: 1216907 Size: SH
  3. At dimension B, measure the distance from the rear face of the low and reverse clutch housing (3) to the rear face of the retaining ring (4).
  4. Calculate Dimension C by subtracting Dimension B from Dimension A.
  5. Select the appropriate selective spacer (1) based upon Dimension C. Refer to Selective Components Specifications .
  6. Install the selective spacer (1) onto the output shaft (2).