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Home >> GMC Truck >> 1998 >> C 2500 Truck 2WD V8-454 7.4L VIN J SFI >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Service and Repair >> Overhaul >> 4L80-E Automatic Transmission >> Repair Instructions >> Center Support Assembly Assemble

Center Support Assembly Assemble

- Tools Required
- J 21363 Intermediate Clutch Inner Seal Protector
- J 23327 Clutch Spring Compressor
- J 38734 Intermediate Clutch Piston Compressor Adapter
- J 36850 Transjel(r)





1. Install the oil cooler fitting seal (690) into the center support (640).





2. Lubricate the new inner (637) and outer (638) intermediate clutch piston seals and seal pockets in the housing with DEXRON III transmission fluid.
3. Install the inner (637) and outer (638) intermediate clutch piston seals onto the intermediate clutch piston (636) with the seal lip facing away from the spring pockets.

NOTICE: Do not over expand the oil seal as it may become damaged.





4. Install the intermediate clutch piston (636) onto the center support (640) using the J 21363. A fine gauge feeler blade can be used to assist with the piston outer seal installation.
5. Remove J 21363.





6. Install the intermediate clutch piston spring and retainer assembly (635). Align the springs with the pockets in the intermediate clutch piston.
7. Install the intermediate clutch piston retainer ring (634) using J 38734 and J 23327.
8. Remove the tools.





9. Install the new direct clutch housing oil seals onto the center support. Do not over expand the oil seals or they may become damaged.
10. Use J 36850 or the equivalent in order to keep the seals in place.

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