Chevrolet Silverado / GMC Sierra. Manual - part 891
1. Remove 4 bolts (1).
2. Remove 12 bolts (2).
Fig. 176: View Of Low And Reverse Clutch Housing Gasket
housing - 2WD.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Courtesy of GENERAL MOTORS CORP.
3. Disengage the low and reverse clutch housing (1) from main housing locating pin (4) and
pawl support pin (5).
4. Remove the low and reverse clutch housing (1).
5. Remove and discard the gasket (2).
NOTE:
To help avoid damaging the park pawl return spring, make sure
the park pawl support pin is not retained in and removed with
the low and reverse clutch housing.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 177: View Of Output Carrier Assembly Components
Courtesy of GENERAL MOTORS CORP.
CAUTION: Always remove or install the output carrier assembly by
holding onto the output shaft. Holding onto the output
carrier assembly instead of the output shaft may allow
the output shaft to fall causing personal injury and/or
property damage.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
6. Remove, as a unit, the output shaft (2) and the output carrier assembly (1).
7. Remove the output shaft (2) from the output carrier assembly (1).
8. Remove the output sun gear (4).
9. Remove the thrust bearing (3) from the output shaft (2) or the output sun gear (4).
Park Pawl Removal
IMPORTANT: The thrust bearing assembly may stick to the output shaft or
the output sun gear.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado