2nd Clutch Assemble

Tools Required

• J 23327  Spring Compressor
• J 28585  Snap Ring Remover
• J 45124  Removable Bridge. See Special Tools .

Note these items during assembly:

• Clean all parts thoroughly and dry them.
CAUTION: When you use compressed air in order to clear fluid passages and to dry parts, always aim the air pressure away from face and eyes. Always wear adequate eye protection in order to avoid injury from dirt and debris that may adhere to parts.
• Use compressed air to clear all passages.
• Apply automatic transmission fluid to all O-ring seals before assembly.
• Soak all clutch fiber plates thoroughly in automatic transmission fluid for a minimum of 30 minutes.

Fig 1: 2nd Clutch Piston Inner & Outer Seal
Courtesy of GENERAL MOTORS CORP.
1. Install new O-ring seals in the 2nd clutch piston (746) as follows:
   1. Install the 2nd clutch inner O-ring seal (748).
   2. Install the 2nd clutch outer O-ring seal (747).
Fig 2: Installing The 2nd Clutch Piston Into 2nd Clutch Housing
Courtesy of GENERAL MOTORS CORP.
2. Install the 2nd clutch piston (746) into the 2nd clutch housing (749) by applying hand pressure and rotating the 2nd clutch piston assembly.
   • Ensure proper seating.
   • Do not pinch the O-ring seal by installing the piston with excessive force.
Fig 3: 2nd Clutch Piston & Components Removed
Courtesy of GENERAL MOTORS CORP.
3. Install the 2nd clutch piston return spring (745).
4. Install the 2nd clutch piston retainer cap (744).
5. Install the 2nd clutch piston 42 mm retaining ring (743) on top of the retainer cap (744).
Fig 4: 2nd Clutch Assemble, J 45124, J 23327, J 21420-2, Clutch Piston Return Spring & Clutch Spring Retainer Cap Retaining Ring
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Position the legs of the J 45124  on the spring retainer cap only where the spring is in contact with the cap. See Special Tools .
6. Using the bridge and legs of the J 45124  (2) with the forcing screw of the J 23327  (1) and J 21420-2 (3) plate of the J 23327  , compress the clutch piston return spring until the groove for the clutch spring retainer cap retaining ring (743) is accessible. See Special Tools .
   • Adjust the legs of the J 45124  to have full contact with the clutch piston return spring retainer cap. See Special Tools .
   • Do not place the legs on the spring retainer cap that is not supported by the spring.
   • Ensure the legs remain in position where the spring retainer cap is in contact with the spring.
Fig 5: 2nd Clutch Piston Retaining Ring
Courtesy of GENERAL MOTORS CORP.
7. Install the 42 mm, 2nd clutch piston retaining ring (743).
8. Remove the tools.
Fig 6: Exploded View Of 2nd Clutch Hub
Courtesy of GENERAL MOTORS CORP.
9. Install into the 2nd clutch housing (749) the following components:
   • 2nd clutch steel plate (742).
   • 2nd clutch fiber plate (741).
   • Continue to alternately install the above components. The 2nd clutch steel wave plates (760) are installed in the top three positions.
Fig 7: Selective Clutch Backing Plate Removed
Courtesy of GENERAL MOTORS CORP.
10. Install the selective 2nd clutch backing plate (740) with the flat side facing the last 2nd clutch fiber plate (741) as shown in the insert.
Fig 8: Installing The 129 mm 2nd Clutch Backing Plate Retaining Ring Into The Groove In 2nd Clutch Housing Using J 28585
Courtesy of GENERAL MOTORS CORP.
11. Using J 28585  , install the 129 mm 2nd clutch backing plate retaining ring (739) into the groove in the 2nd clutch housing (756).
Fig 9: Measuring The Clutch Backing Plate Clearance
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The thickness of the backing plate (740) is measured at the outer thickness.
12. Measure the clutch backing plate clearance. Refer to Clutch Backing Plate Clearance Measurement .