Chevrolet Silverado / GMC Sierra. Service manual — part 1127

Courtesy of GENERAL MOTORS CORP.

4. Inspect the sprag assembly retainer rings (643) for wear or damage.

5. Install the sprag assembly retainer rings (643) into the forward clutch sprag assembly (644).

Fig. 383: Inspection Areas On Forward Sprag Clutch Inner Race And Input Sun
Gear Assembly

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Courtesy of GENERAL MOTORS CORP.

6. Inspect the forward sprag clutch inner race and input sun gear assembly (640) for the

following conditions:

Damaged spline or gear teeth

Ring groove damage

Surface finish damage

Loose retainer

Wear

Cracks

7. Install the forward sprag clutch inner race and input sun gear assembly (640) into the

forward sprag and outer race assembly.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 384: Locating Overrun Clutch
Courtesy of GENERAL MOTORS CORP.

8. Inspect the overrun clutch hub (639) for the following conditions:

Spline damage

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Plugged lubrication holes

Damaged tangs

Cracks

9. Install the overrun clutch hub (639) onto the sprag clutch inner race and input sun gear

assembly (640).

10. Install the overrun clutch hub retaining snap ring (638).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado