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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Automatic Transmission Service, Removal & Installation - 4L60-E) >> Repair Instructions >> Accumulator Assembly, Spacer Plate, and Gaskets >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  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 .
    Fig 1: Accumulator Cover Retaining Bolts
    G01980047Courtesy of GENERAL MOTORS CORP.

    Important:  The 1-2 accumulator can be removed without removing the control valve assembly.

  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.
  6. Disassemble the 1-2 accumulator.
    1. 6.1. Blow compressed air into the 1-2 accumulator cover, as shown, to remove the 1-2 accumulator piston.
    2. 6.2. Remove the 1-2 accumulator inner and outer springs.
  7. Inspect the 1-2 accumulator inner and outer springs for cracks.
    Fig 2: Inspecting 1-2 Accumulator Inner & Outer Springs For Cracks
    G01980048Courtesy 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:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
      Fig 3: 1-2 Accumulator Piston Seal
      G01980049Courtesy of GENERAL MOTORS CORP.
  10. Inspect the 1-2 accumulator cover for the following defects:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
      Fig 4: Inspecting 1-2 Accumulator Cover
      G01980050Courtesy of GENERAL MOTORS CORP.
  11. Remove the spacer plate support retaining bolts.

    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
  12. Remove the spacer plate support.
    Fig 5: Spacer Plate Support Retaining Bolts
    G01980051Courtesy of GENERAL MOTORS CORP.
  13. Remove the spacer plate to valve body gasket, the spacer plate and the spacer plate to transmission case gasket.
    Fig 6: Removing Spacer Plate To Valve Body Gasket
    G01980052Courtesy of GENERAL MOTORS CORP.
  14. Remove the 3-4 accumulator piston (2).
  15. Inspect the 3-4 accumulator spring for cracks.
    Fig 7: 3-4 Accumulator Piston
    G01980053Courtesy of GENERAL MOTORS CORP.
  16. Remove the 3-4 accumulator piston seal (1) from the 3-4 accumulator piston.
  17. Inspect the 3-4 accumulator piston for the following defects:
    • Porosity
    • Cracks
    • Scoring
    • Nicks and scratches
      Fig 8: 3-4 Accumulator Piston Seal
      G01980054Courtesy of GENERAL MOTORS CORP.
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