4-5 Clutch Drum Assembly Disassemble: Notes

Tools Required

• J 23327  Clutch Spring Compressor. See Special Tools .
• J 25024-A  Servo Piston/Clutch Spring Compressor. See Special Tools .
• J 28585  Snap Ring Remover. See Special Tools .
• J 45186  Forward and Direct Clutch Spring Compressor. See Special Tools .

Fig 1: Exploded View Of 4-5 Clutch Drum Assembly
Courtesy of GENERAL MOTORS CORP.
1. Using J 28585  remove the 4-5 clutch backing plate retaining ring (575) from the 4-5 clutch drum assembly (584). See Special Tools .
2. Remove the following components from the 4-5 clutch drum assembly (584):
   • The 4-5 clutch backing plate (576)
   • The 4 fiber plates (577)
   • The 4 steel plates (578)
Fig 2: Removing/Installing 4-5 Clutch Piston Return Spring Assembly
Courtesy of GENERAL MOTORS CORP.
3. Remove the 4-5 clutch piston return spring assembly (580).
   1. Place the J 25024-A  (3) in a vise with the forcing screw on the bottom and backed out. See Special Tools .
   2. Place the J 45186  (1) on the 4-5 clutch piston return spring assembly (580). See Special Tools .
   3. Place the J 21420-2 (4) from the J 23327  on top of the forcing screw of J 25024-A  (3). See Special Tools .
   4. Place the clutch housing with the J 45186  (1) on the J 21420-2 (4) and under the arms of J 25024-A  (3). See Special Tools .
   5. With the forcing screw, compress the clutch spring to allow the removal of the retaining ring.
   6. Use J 28585  (2) or snap ring pliers to remove the retaining ring (579). See Special Tools .
4. Remove the 4-5 clutch piston return spring assembly (580).
Fig 3: View Of Front Differential Transfer Drive Gear Assembly & 4-5 Clutch Assembly
Courtesy of GENERAL MOTORS CORP.
CAUTION: Wear safety glasses when using compressed air in order to prevent eye injury.
5. Using the case as a holding fixture, install the front differential transfer drive gear assembly (14) into the output gear bore.
6. Install the 4-5 clutch assembly (15) onto the front differential transfer drive gear assembly (14), with the clutch piston facing up, so that the fluid passages are around the sealing rings.
Fig 4: View Of Fluid Passage & 4-5 Clutch Piston Assembly
Courtesy of GENERAL MOTORS CORP.
7. Apply air pressure to the fluid passage (1) in the end of the front differential transfer drive gear assembly shaft and remove the 4-5 clutch piston assembly (582).
8. Remove the 4-5 clutch drum assembly and the front differential transfer drive gear assembly from the case.
Fig 5: View Of 4-5 Clutch Piston & Seals
Courtesy of GENERAL MOTORS CORP.
9. Remove the piston inner seal (581) and the piston outer seal (583) from the 4-5 clutch piston (582).