GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC Suburban - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Center Support Assembly Assemble

Tools Required

    • J 21363 Intermediate Clutch Inner Seal Protector
    • J 23327 Clutch Spring Compressor
    • J 38734 Intermediate Spring Compressor Adapter
    • J 36850 Assembly Lubricant

    Object Number: 54646 Size: SH
  1. Install the oil cooler pipe fitting seal (690) into the center support (640).

    2. Object Number: 28706 Size: SH
  2. Lubricate the new inner (637) and outer (638) intermediate clutch piston seals and seal pockets in the intermediate clutch piston (636) 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.

    4. Object Number: 54571 Size: SH
  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 the J 21363 .

    6. Object Number: 28709 Size: SH
  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. Object Number: 181742 Size: SH

    Notice: Do not overexpand the oil seal rings. Damage to the rings may result.

  9. Install the new direct clutch housing oil seals (639) onto the center support (640).
  10. Use J 36850 or the equivalent in order to keep the oil seals in place.