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Accumulator Assembly (4L80-E): Removal

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Remove the oil pan and filter. See DRAINING & REFILLING  under LUBRICATION. Remove the Transmission Fluid Pressure (TFP) manual valve position switch bolts and the TFP valve position switch. The 5 O-rings should remain attached to the TFP valve position switch.
  2. Remove the control valve body assembly bolts. Remove the fluid transmission fluid level indicator stop bracket. Remove the lube oil pipe retainer and the clamp. Remove the lube oil pipe.
  3. Remove the manual shaft detent spring assembly. Remove the control valve body assembly (44) which includes the accumulator assembly. See Figure.
  4. Remove the 3rd and 4th clutch accumulator housing bolts (53). Remove the 3rd and 4th clutch accumulator housing (51). Remove the accumulator housing gasket (47). See Figure.
  5. The accumulator housing gasket may be stuck to the spacer plate (46). Remove the 3rd clutch accumulator piston spring (50). Remove the 4th clutch accumulator piston spring (49). See Figure.
  6. Remove the control valve body spacer plate (46). Remove the control valve body assembly to spacer plate gasket (45) from the spacer plate (46). See Figure.
  7. Inspect all components for wear or damage. See Figure. Replace all worn or damaged parts.
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