Chevrolet Silverado / GMC Sierra. Service manual — part 1072

Fig. 178: View Of 1-2 Accumulator Cover & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Remove the transmission filter. Refer to Automatic Transmission Fluid and Filter

Replacement.

2. Remove the valve body. Refer to Valve Body and Pressure Switch Replacement.

3. Remove the accumulator cover bolts.

4. Remove the 1-2 accumulator cover.

IMPORTANT: The 1-2 accumulator can be removed without removing the

valve body.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 179: View Of 1-2 Accumulator Cover & Pin Assembly
Courtesy of GENERAL MOTORS CORP.

5. Remove the 1-2 accumulator cover (57) and pin.

6. Disassemble the 1-2 accumulator assembly (54, 56, 57, 104).

7. Inspect the 1-2 accumulator springs for cracks.

IMPORTANT: regular production option (RPO) M33 transmissions do not

use a 1-2 accumulator spring inner (104).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 180: View Of Accumulator Piston Seal & Accumulator Piston
Courtesy of GENERAL MOTORS CORP.

8. Remove the 1-2 accumulator piston seal (1) from the 1-2 accumulator piston.

9. Inspect the 1-2 accumulator piston for the following conditions:

Porosity

Cracks

Scoring

Nicks and scratches

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 181: Inspecting 1-2 Accumulator Cover
Courtesy of GENERAL MOTORS CORP.

10. Inspect the 1-2 accumulator cover for the following conditions:

Porosity

Cracks

Scoring

Nicks and scratches

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado