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Home >> Hummer >> 2008 >> H3 Adventure, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> On-Vehicle Repair Instructions >> Accumulator Assembly, Spacer Plate, and Gaskets >> Removal Procedure

Removal Procedure

  1. Remove the transmission oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
    2. IMPORTANT: The 1-2 accumulator can be removed without removing the control valve assembly.
  2. Remove the control valve body. Refer to Valve Body and Pressure Switch Replacement .
    3. Fig 1: View Of 1-2 Accumulator Cover Retaining Bolts
    GM1403685Courtesy of GENERAL MOTORS CORP.
  3. Remove the accumulator cover retaining bolts.
  4. Remove the 1-2 accumulator cover assembly.
    • RWD (1)
    • 4WD (2)
    5. Fig 2: Disassembling 1-2 Accumulator
    GM298151Courtesy of GENERAL MOTORS CORP.
  5. 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.
  6. Inspect the 1-2 accumulator inner and outer springs for cracks.
    7. Fig 3: View Of Accumulator Piston Seal & Accumulator Piston
    GM298143Courtesy of GENERAL MOTORS CORP.
  7. Remove the 1-2 accumulator piston seal (1) from the 1-2 accumulator piston.
  8. Inspect the 1-2 accumulator piston for the following defects:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
    9. Fig 4: Inspecting 1-2 Accumulator Cover
    GM7734Courtesy of GENERAL MOTORS CORP.
  9. Inspect the 1-2 accumulator cover for the following defects:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
    10. Fig 5: View Of Spacer Plate Support Retaining Bolts
    GM1403684Courtesy of GENERAL MOTORS CORP.
  10. Remove the spacer plate support retaining bolts.
    • RWD (4)
    • 4WD (3, 4)
    11. IMPORTANT: Use care not to drop the following items that will be removed along with the spacer plate:
    • The number 1 checkball
    • The 3-4 accumulator spring
  11. Remove the spacer plate support.
    • RWD (1)
    • 4WD (2)
    12. Fig 6: View Of Spacer Plates And Spacer Plate Body Gasket
    GM14469Courtesy of GENERAL MOTORS CORP.
  12. Remove the following:
    • The spacer plate to valve body gasket
    • The spacer plate
    • The spacer plate to transmission case gasket
    13. Fig 7: Identifying 3-4 Accumulator Piston
    GM647519Courtesy of GENERAL MOTORS CORP.
  13. Remove the 3-4 accumulator piston (2).
  14. Inspect the 3-4 accumulator spring for cracks.
    15. Fig 8: View Of Accumulator Piston Seal & Accumulator Piston
    GM298143Courtesy of GENERAL MOTORS CORP.
  15. Remove the 3-4 accumulator piston seal (1) from the 3-4 accumulator piston.
  16. Inspect the 3-4 accumulator piston for the following defects:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
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