Tools Required

SA9179NE  Dial Indicator

Fig 1: Inspecting The 3rd Clutch Piston & Clutch Piston Check Valve
Courtesy of GENERAL MOTORS CORP.
1. Inspect the 3rd clutch piston (818) and the clutch piston check valve.
2. Replace the 3rd clutch piston if the check valve is missing, stuck, or damaged.
Fig 2: Inspecting 3rd Clutch Piston For Damage
Courtesy of GENERAL MOTORS CORP.
3. Inspect the following components for wear or damage:
   • 3rd clutch piston spring cap (815)
   • 3rd clutch piston retaining ring (814)
   • 3rd clutch piston return spring (816)
4. Replace the components if faulty.
Fig 3: Inspecting 3rd Clutch Components
Courtesy of GENERAL MOTORS CORP.
5. Inspect the following 3rd clutch components for wear, damage, or severe discoloration:
   • 3rd clutch steel flat plates (813)
   • 3rd clutch steel wave plates (830)
   • 3rd clutch fiber plates (812)
   • 3rd clutch selective backing plate (811)
6. If the clutch steel plates are worn or damaged or severely discolored, replace the plates as a complete set.
7. If the clutch fiber plates are worn, damaged, or discolored, replace the plates as a complete set.
8. If the 3rd clutch selective backing plate (811) is worn, damaged, or severely discolored, inspect the clutch backing plate-to-top disc clearance, then replace the clutch backing plate making sure to use the correct selective size backing plate.