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Home >> Hummer >> 2009 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 6L80 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Off-Vehicle Repair Instructions >> 1-2-3-4 and 3-5 Reverse Clutch Overhaul (6L50/6L80) >> 1-2-3-4 Clutch Piston Removal

1-2-3-4 Clutch Piston Removal

Fig 1: Identifying 1-2-3-4 Clutch Piston
GM1555358Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 1-2-3-4 Clutch Piston Dam Retaining Ring.
CAUTION: Use care when compressing the 1-2-3-4 clutch spring and dam assembly. Compressing the dam assembly too much may damage it.
CAUTION: Refer to Retaining Ring Reuse Caution .

Special Tool: 
J 38734  Intermediate Spring Compressor Adapter. See Special Tools .
2 1-2-3-4 Clutch Piston Dam Assembly
3 1-2-3-4 Clutch Spring
4 1-2-3-4 Clutch Piston
Tip: 
  • It may be necessary to apply air to the apply passage in order to remove the piston. Install the 1-2-3-4 clutch housing onto the torque converter (with fluid pump) housing assembly in order to apply air.
  • After air is applied, it may be necessary to turn the housing assembly upside down and carefully tap the housing against a flat surface in order to release the piston.