GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Express 🢒 Transmission 🢒 Transfer Case - BW 4473-NP3 🢒 Adapter Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the transfer case from the vehicle. Refer to Transfer Case Assembly Replacement.

    3. Object Number: 860431 Size: SH
  3. Remove the mounting bolts from the adapter to the transmission.
  4. Remove the adapter from the transmission.
  5. Remove the seal between the transfer case and the adapter.
  6. Remove the transfer case to the adapter gasket.

Installation Procedure

    Object Number: 860431 Size: SH

    Note: Always use a new gasket and seal for the adapter. Do not use any type of sealant or adhesive in place of or with the gasket or the seal.

  1. Install the new seal on the adapter.

    2. Note: The transfer case adapter must be installed so that the adapter is evenly seated to the transmission before installing the retaining nuts.

  2. Install the adapter to the transmission.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the adapter mounting bolts to the transmission and tighten to 50 N·m (37 lb ft).

    4. Note: The locating tab on the gasket should always be pointing up.

  4. Install the new gasket to the adapter.
  5. Install the transfer case to the adapter. Refer to Transfer Case Assembly Replacement.
  6. Install the transmission support crossmember. Refer to Transmission Support Crossmember Replacement.
  7. Remove the transmission jack from the transmission.
  8. Check the fluid level of the transfer case. Refer to Transfer Case Fluid Replacement.
  9. Lower the vehicle. Refer to Lifting and Jacking the Vehicle.