GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Transfer Oil Pump Inlet Screen and Pipe Seal Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Place a drain pan under the transaxle bottom pan in order to catch fluid.
  3. Loosen the bottom pan bolts and drain any fluid in the pan.

    4. Object Number: 97463 Size: SH

    Important: Removing the bottom pan on the HYDRA-MATIC 4T80-E will only partially drain the transaxle fluid. The remaining fluid is held in the side cover and in the torque converter.

    Removing the drain plug in the case after the bottom pan removal will drain the fluid from the side cover. It is not necessary to drain the torque converter during most service procedures.

  4. Remove the bottom pan bolts.
  5. Remove the bottom pan.
  6. Remove the gasket.

    7. Object Number: 97465 Size: SH
  7. Remove the left and/or right scavenger screens.
  8. Remove the seals. Use a small screwdriver to pry the seals from the case. Do not score or damage the case.
  9. Inspect the bottom pan and the transaxle case for dents or nicks in the sealing surface. Replace damaged parts.
  10. Inspect the bolts for damaged threads. Replace damaged bolts.
  11. Clean and dry the bottom pan and the case sealing surfaces.

    12. The bottom pan and the case sealing surfaces must be clean and dry for proper sealing.

Installation Procedure

    Object Number: 97465 Size: SH
  1. Install the new left and right scavenger seals.
  2. Install the new left and right scavenger screens.
  3. Remove any residual transmission fluid from the following components:
    4. • The case
    • Wipe any residual fluid from the outside of the case.
    • The bottom pan
    • The screws
    • Use a rubber tipped hose in order to dry the screws, if necessary. All of the screws must be completely free of transmission fluid upon reinstallation.

    Important: The bottom pan gasket is not reusable. Replace it with a new part after removing the bottom pan for any service.

  4. Install the bottom pan with the new gasket.

    5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the bolts. Tighten the bolts finger tight, and then to specification in proper sequence.

    6. Tighten

        • Initial: 3 N·m (27 lb in)
        • Intermediate: 6 N·m (53 lb in)
        • Final: 12 N·m (106 lb in)
  6. Lower the vehicle.
  7. Add DEXTRON®-III transmission fluid. Refer to Fluid Capacity Specifications .