GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1996 🢒 Aurora 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Drive/Driven Sprocket and Chain Removal

    Object Number: 11864 Size: SH
  1. Remove the thrust bearings (132, 440) from the drive and driven sprockets).
  2. Remove the following parts:
    3. • The drive sprocket and turbine shaft assembly (407-410)
    • The driven sprocket (415)

       Important: Mark the chain in order to indicate the direction in which you removed the chain.

    • Remove the chain (414)
  3. Use two screwdrivers in order to hold the driven sprocket in place, and pry off the driven sprocket . Place small blocks of wood or pieces of plastic under the screwdrivers in order to protect the case. Use a plastic hammer in order to tap the drive sprocket and the turbine shaft.

    4. Object Number: 11865 Size: SH
  4. Remove the driven sprocket support assembly (418-427)
  5. Inspect the scavenge tube case area for a dislodged seal (53) which may have become dislodged from the driven sprocket support assembly (418-427) when the scavenge tube was previously removed.