4-5 Clutch Drum Assembly Assemble

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 45185  Bore Gage Set. See Special Tools .
• J 45186  Forward and Direct Clutch Spring Compressor. See Special Tools .

Fig 1: View Of 4-5 Clutch Piston & Clutch Drum Assembly
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Soak the new clutch discs in automatic transmission fluid for at least 2 hours before installation.
1. Apply automatic transmission fluid to the new piston seals.
2. Install a new piston inner seal (581) and a new piston outer seal (583) on to the 4-5 clutch piston (582).
3. Apply automatic transmission fluid to the inner and outer seal surfaces of the 4-5 clutch drum assembly (584).
4. Install the 4-5 clutch piston assembly (582) into the 4-5 clutch drum assembly (584).
Fig 2: Installing 4-5 Clutch Piston Return Spring Assembly
Courtesy of GENERAL MOTORS CORP.
5. Install the 4-5 clutch piston return spring assembly (580) on to the 4-5 clutch piston assembly, indexing the springs to the holes in the 4-5 clutch piston assembly.
Fig 3: Removing/Installing 4-5 Clutch Piston Return Spring Assembly
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Make sure that the end gap of the retaining ring is not aligned with the spring retainer claw.
6. Install the 4-5 clutch piston return spring retaining ring (579).
   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 installation of the retaining ring.
   6. Use J 28585  (2) or snap ring pliers to install the retaining ring (579). See Special Tools .
Fig 4: Assembling 4-5 Clutch Drum Assembly
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Make sure that you have the correct number of plates, and that they are in the correct order.
7. Install the 4 fiber plates (577) and the 4 steel plates (578) into the 4-5 clutch drum assembly (584).
8. Install the 4-5 clutch backing plate (576) into the 4-5 clutch drum assembly (584).
Fig 5: Installing 4-5 Clutch Backing Plate Retaining Ring
Courtesy of GENERAL MOTORS CORP.
9. Using J 28585  install the 4-5 clutch backing plate retaining ring (575) into the groove of the 4-5 clutch drum assembly (584). See Special Tools . Make sure that the end gap of the retaining ring is not aligned with one of the cutouts in the drum.