Chevrolet Silverado / GMC Sierra. Manual - part 990
Fig. 500: Identifying Selective Spacer Dimension B - 4WD
Courtesy of GENERAL MOTORS CORP.
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).
TRANSMISSION END PLAY MEASUREMENT
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Tools Required
J 24446 Rear Bearing Installer. See Special Tools.
J 5959 Dial Indicator Set. See Special Tools.
Measurement
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 501: Identifying Rear Bearing
Courtesy of GENERAL MOTORS CORP.
1. Using J 24446 (1), install the ball bearing (2) until the bearing seats. See Special Tools.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 502: Locating Transmission Retaining Ring
Courtesy of GENERAL MOTORS CORP.
2. Align the retaining ring (1) so that the beveled edge is facing up.
3. Install the retaining ring (1).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado