Chevrolet Silverado / GMC Sierra. Service manual — part 1090

Fig. 246: Identifying Output Shaft Components
Courtesy of GENERAL MOTORS CORP.

3. Remove the case extension bolts (32).

4. Remove the case extension (31) and the case extension to case seal (30).

5. Remove the output shaft sleeve (690) and the output shaft O-ring seal (691). Not all models

use an output shaft sleeve (690) and O-ring seal (691).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 247: Identifying Special Tool J29837-A & Output Shaft O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

6. Install the J 29837-A as shown. See Special Tools. Support the output shaft (687) with

adjustable stop (1).

TRANSMISSION FLUID PAN AND FILTER ASSEMBLY REMOVAL

IMPORTANT: If the J 29837-A is not used, the output shaft (687) may fall

free when the input carrier retaining ring is removed. See
Special Tools.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 248: View Of Transmission Oil Pan & Gasket
Courtesy of GENERAL MOTORS CORP.

1. Remove the transmission oil pan screws (76).

2. Remove the transmission oil pan (75) and the transmission oil pan gasket (73).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 249: Identifying Transmission Oil Filter Assembly
Courtesy of GENERAL MOTORS CORP.

3. Remove the transmission oil filter assembly (72).

4. The filter may help in diagnosis. Cut away the top portion of the plastic filter housing and

remove. Inspect the filter for the presence of the following items which may indicate wear
or corrosion:

Clutch material

Bronze slivers indicating bushing wear

Steel particles

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado