Hummer H2. Manual — part 2278

12. Lower the vehicle.

13. Fill the transmission to the proper level with DEXRON(R) III transmission fluid. Refer to Transmission

Fluid Checking Procedure .

ACCUMULATOR ASSEMBLY, SPACER PLATE, AND GASKETS

Tools Required

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J 25025-B Dial Indicator Post and Guide Pin Set. See Special Tools and Equipment .

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J 36850 Transjel Lubricant

Removal Procedure

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 148: 1-2 Accumulator Cover
Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

2. Remove the transmission oil pan and filter. Refer to Automatic Transmission Fluid/Filter

Replacement .

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

4. Remove the accumulator cover retaining bolts.

5. Remove the 1-2 accumulator cover assembly.

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

assembly.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 149: Disassembling 1-2 Accumulator
Courtesy of GENERAL MOTORS CORP.

6. Disassemble the 1-2 accumulator.

1. Blow compressed air into the 1-2 accumulator cover, as shown, to remove the 1-2 accumulator

piston.

2. Remove the 1-2 accumulator inner and outer springs.

7. Inspect the 1-2 accumulator inner and outer springs for cracks.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 150: Identifying Accumulator Piston Seal
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 defects:

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Porosity

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Cracks

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Scoring

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Nicks and scratches

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2