Center Support Assemble

Tools Required

• J 23327  Clutch Spring Compressor
• J 45127  Centre 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
• J 46239-1  Second Coast Clutch Outer Protector
• J 46239-2  Second Coast Clutch Inner Protector
• J 46239-3  Second Coast Clutch Pusher
• J-46240-1  Seal Protector
• J 46240-2  Seal Protector

Fig 1: Inspecting Center Support Components
Courtesy of GENERAL MOTORS CORP.
1. Inspect the centre 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 centre support housing.
Fig 2: View Of 2nd Clutch Spring Retainer Ring & Spring
Courtesy of GENERAL MOTORS CORP.
3. Install the 2nd clutch piston.
4. Install the 2nd clutch piston spring (521) into the centre 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 centre support (518).
7. Remove J 23327  from the centre support (518).
Fig 3: Identifying 2nd Clutch Apply Plates
Courtesy of GENERAL MOTORS CORP.
8. Install the 2nd clutch apply plate (523) into the centre 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 centre support (518).
11. Install the 2nd clutch backing plate snap ring (527) into the centre 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: Identifying 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).
Fig 6: Locating 2nd Coast Clutch Spring
Courtesy of GENERAL MOTORS CORP.
16. Install the 2nd coast clutch spring (529).
17. Using J 23327  compress the 2nd coast clutch spring (529).
18. Install the 2nd coast clutch spring retainer (530).
19. Remove J 23327  .
Fig 7: Identifying 2nd Coast Clutch Plates
Courtesy of GENERAL MOTORS CORP.
20. Install the 2nd coast clutch spacer (531).
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 snap 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: View Of Low And Reverse Clutch Piston With 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 centre support (518). See Special Tools .
Fig 10: Identifying Low And 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 snap ring (515) into the centre support (518).
Fig 11: Locating Low And Reverse Apply Plates
Courtesy of GENERAL MOTORS CORP.
30. 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 .

    Install the low and reverse apply plate (514) into the centre support (518).

31. Install the low and reverse clutch backing plate (511) and the snap ring (510).
Fig 12: Measuring Low Reverse Clutch Pack Travel
Courtesy of GENERAL MOTORS CORP.
32. 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.
33. 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.
34. Subtract H2 from H1 this is the low reverse clutch pack travel. Refer to Clutch Piston Travel Specifications .
Fig 13: Center Support With J 45127
Courtesy of GENERAL MOTORS CORP.
35. Using J 45127  install the centre support (18) into the case. See Special Tools .