Chevrolet Silverado / GMC Sierra. Service manual — part 1125

Fig. 375: View Of Input Housing To Output Shaft Seal
Courtesy of GENERAL MOTORS CORP.

Install a new input housing to output shaft seal (636).

OVERRUN CLUTCH INSTALLATION

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 376: Identifying Overrun Clutch Plates
Courtesy of GENERAL MOTORS CORP.

1. Inspect the fiber plate assemblies (645B) and the steel plates (645A) for the following

defects:

Damaged tangs

Delamination

Excessive wear

Wear or heat damage

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 377: Aligning Overrun Clutch Plates
Courtesy of GENERAL MOTORS CORP.

2. Install the overrun clutch plates into the input housing starting with a steel plate (645B) and

alternating with fiber plate assemblies (645A).

3. Index the plates in the input housing with the wide notches remaining open.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 378: Input Sun Gear Bearing Assembly
Courtesy of GENERAL MOTORS CORP.

4. Install the input sun gear bearing assembly (637) into the input housing.

FORWARD CLUTCH SPRAG DISASSEMBLE

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado