Chevrolet Silverado / GMC Sierra. Service manual — part 981

Fig. 473: Locating Intermediate Sun Gear, Sun Gear Spacer & Main Shaft
Courtesy of GENERAL MOTORS CORP.

8. Install the intermediate sun gear (3) and the sun gear spacer (2) onto the main shaft (4).

9. As a unit, install the main shaft (4), the intermediate sun gear (3), and the sun gear spacer (2)

into the intermediate planetary carrier module (5).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

10. Align the output sun gear (1) so that the flat side of the sun gear is facing the sun gear

spacer.

11. Install the output sun gear (1) onto the main shaft (4).

12. Make sure the output sun gear and sun gear spacer splines are engaged.

Fig. 474: Aligning Thrust Bearing Assembly

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Courtesy of GENERAL MOTORS CORP.

13. Align the thrust bearing assembly (1) so that the blue stripe on the thrust bearing assembly is

facing away from the output sun gear (2).

14. Install the thrust bearing assembly (1) into the output sun gear (2).

LOW AND REVERSE CLUTCH INSTALLATION

NOTE:

Installing the thrust bearing incorrectly may cause permanent
damage to the transmission.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 475: View Of Low & Reverse Clutch Plates
Courtesy of GENERAL MOTORS CORP.

1. Starting with a low and reverse clutch fiber plate, alternately install 6 low and reverse

clutch fiber plates (2) and 5 low and reverse clutch steel plates (3).

2. Install the correct selective low and reverse clutch steel plate (1).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado