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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 4L60-E/4L65-E (Introduction, Service & Replacement)) >> Repair Instructions >> Accumulator Assembly, Spacer Plate, and Gaskets >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of 1-2 Accumulator Cover & Bolts
    GM14464Courtesy of GENERAL MOTORS CORP.
  1. Remove the transmission filter. Refer to Automatic Transmission Fluid/Filter Replacement .
    2. IMPORTANT: The 1-2 accumulator can be removed without removing the valve body.
  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.
    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, in order 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 & Bolts
    GM14468Courtesy of GENERAL MOTORS CORP.
  10. Remove the spacer plate support bolts.
    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
    • The 3-4 accumulator pin
  11. Remove the spacer plate support.
    12. Fig 6: View Of Spacer Plates And Spacer Plate Body Gasket
    GM14469Courtesy of GENERAL MOTORS CORP.
  12. Remove the spacer plate to valve body gasket, the spacer plate and 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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