Center Support Assemble

Tools Required

• J 23327  Clutch Spring Compressor
• J 45127  Center Support Removal Tool. See Special Tools .
• J 45136  Seal Protector. See Special Tools .
• J 45140  Seal Protector. See Special Tools .
• J-45688  Piston Installer - Pusher. See Special Tools .
• J 46239-1  Second Coast Clutch Outer Protector. See Special Tools .
• J 46239-2  Second Coast Clutch Inner Protector. See Special Tools .
• J 46239-3  Second Coast Clutch Pusher. See Special Tools .
• J-46240-1  Seal Protector. See Special Tools .
• J 46240-2  Seal Protector. See Special Tools .

Fig 1: Installing J-46240-1 & J 45145 Into Housing
Courtesy of GENERAL MOTORS CORP.
1. Inspect the center support components for the following:
   • Plugged fluid passages
   • Worn or damaged splines
   • Worn or damaged pistons
   • Worn or damaged clutch plates
2. Install J-46240-1  (2), and J 45145 (3) into the housing. See Special Tools .
Fig 2: View Of 2nd Clutch Spring Retainer Ring & Spring
Courtesy of GENERAL MOTORS CORP.
3. Install the 2nd clutch piston (520).
4. Install the 2nd clutch piston spring (521) into the center support (518).
5. Use J 23327  to compress the 2nd clutch piston spring (521).
6. Install the 2nd clutch spring retainer ring (522) into the center support (518).
7. Remove J 23327  from the center support (518).
Fig 3: Identifying 2nd Clutch Plates
Courtesy of GENERAL MOTORS CORP.
8. Install the 2nd clutch apply plate (523) into the center support (518).
9. Install the 2nd clutch plates. Start by installing the 2nd clutch plate (524) with external splines. Alternate with the 2nd clutch plate (525) with internal splines. Refer to Clutch Plate Selection Specifications .
10. Install the 2nd clutch backing plate (526) into the center support (518).
11. Install the 2nd clutch backing plate retainer ring (527) into the center support (518).
Fig 4: Measuring 2nd Clutch Pack Travel
Courtesy of GENERAL MOTORS CORP.
12. Measure the distance between the 2nd clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
13. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the 2nd clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
14. Subtract H2 from H1 this is the 2nd clutch pack travel. Refer to Clutch Piston Travel Specifications .
Fig 5: Installing 2nd Coast Clutch Piston
Courtesy of GENERAL MOTORS CORP.
15. Using J 46239-1  (3), J 46239-2  (2) and J 46239-3  (1), install the 2nd coast clutch piston (528). See Special Tools .
Fig 6: Locating 2nd Coast Clutch Spring & Retainer
Courtesy of GENERAL MOTORS CORP.
16. Install the 2nd coast clutch spring (529) into the center support (518).
17. Using J 23327  compress the 2nd coast clutch spring (529).
18. Install the 2nd coast clutch spring retainer (530) into the center support (518).
19. Remove J 23327  .
Fig 7: Identifying 2nd Coast Clutch Plates
Courtesy of GENERAL MOTORS CORP.
20. Install the 2nd coast clutch spacer (531) into the center support (518).
21. Install the 2nd coast clutch plates. Starting with the 2nd coast clutch plate (532) with external splines. Alternate with the 2nd coast clutch plate (533) with internal splines. Refer to Clutch Plate Selection Specifications .
22. Install the 2nd coast clutch backing plate (534).
23. Install the 2nd coast clutch backing plate retainer ring (535).
Fig 8: Measuring 2nd Coast Clutch Pack Travel
Courtesy of GENERAL MOTORS CORP.
24. Measure the distance between the 2nd coast clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
25. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the 2nd coast clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
26. Subtract H2 from H1 this is the 2nd coast clutch pack travel. Refer to Clutch Piston Travel Specifications .
Fig 9: Installing Low & Reverse Clutch Piston Into Center Support
Courtesy of GENERAL MOTORS CORP.
27. Use the J-46240-1  (2), J-45688  (1) and the J 45136  (3) to install the low and reverse clutch piston (517) into the center support (518). See Special Tools .
Fig 10: View Of Low & Reverse Clutch Spring Retainer Ring
Courtesy of GENERAL MOTORS CORP.
28. Use J 23327  , compress the low and reverse clutch piston spring (516).
29. Install the low and reverse clutch spring retainer ring (515) into the center support (518).
Fig 11: Locating Low & Reverse Plates
Courtesy of GENERAL MOTORS CORP.
30. Install the low and reverse apply plate (514) into the center support (518).
31. Install the low and reverse clutch plates. Start with the low and reverse clutch plate (513) with external splines. Alternate with the low and reverse clutch plate (512) with internal splines. Refer to Clutch Plate Selection Specifications .
32. Install the low and reverse clutch backing plate (511) and the retainer ring (510) into the center support (518).
Fig 12: Measuring Low Reverse Clutch Pack Travel
Courtesy of GENERAL MOTORS CORP.
33. Measure the distance between the low and reverse clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
34. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the low and reverse clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
35. Subtract H2 from H1 this is the low reverse clutch pack travel. Refer to Clutch Piston Travel Specifications .
Fig 13: View Of Center Support
Courtesy of GENERAL MOTORS CORP.
36. Using J 45127  install the center support (18) into the case. See Special Tools .