Chevrolet Silverado / GMC Sierra. Service manual — part 1126

Fig. 379: Locating Overrun Clutch
Courtesy of GENERAL MOTORS CORP.

1. Remove the overrun clutch hub retaining snap ring (638).

2. Remove the overrun clutch hub (639).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

3. Remove the forward sprag clutch inner race and input sun gear assembly (640).

Fig. 380: View Of Sprag Assembly Retainer Rings
Courtesy of GENERAL MOTORS CORP.

4. Remove the sprag assembly retainer rings (643).

5. Remove the forward sprag assembly from the forward clutch outer race (644).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

FORWARD CLUTCH SPRAG ASSEMBLE

Fig. 381: Forward Sprag Assembly
Courtesy of GENERAL MOTORS CORP.

1. Inspect the forward sprag assembly (642) for the following conditions:

Wear or damage

Weak or broken springs

2. Inspect the forward clutch outer race (644) for the following conditions:

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Race wear or damage

Spline wear

Surface finish damage

3. Install the forward sprag assembly (642) into the forward clutch outer race (644).

Fig. 382: View Of Sprag Assembly Retainer Rings

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado