Chevrolet Silverado / GMC Sierra. Service manual — part 1167

Fig. 526: Cross Sectional View Of Output Shaft Seal
Courtesy of GENERAL MOTORS CORP.

1. Using the J 21426 , install an output shaft sleeve (690) and an output shaft seal (691). See

Special Tools.

Do not push the sleeve past the machined surface on the output shaft.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 527: Locating Case Extension Case Seal
Courtesy of GENERAL MOTORS CORP.

2. Install the case extension to case seal (30) and the case extension (31).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

3. Install the case extension to case bolts (32).

Tighten: Tighten the bolts to 45 N.m (33 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 528: View Of Transmission Speed Sensor
Courtesy of GENERAL MOTORS CORP.

4. Inspect the transmission speed sensor for the following conditions:

Cracks

Nicks

Damage

Fig. 529: View Of Speed Sensor, Retaining Bolt & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

5. Install a new O-ring seal (37) on the internal transmission speed sensor (36).

6. Install the internal transmission speed sensor (36).

7. Install the speed sensor retaining bolt (35).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado