2013 Subaru Legacy Base, Automatic CVT TransFACTORY OEM SERVICE PROCEDURE

Extension Case: Installation

  1. Clean the mating surface of extension case and transmission case.
  2. Select the transfer drive gear shim. Refer to ADJUSTMENT .
  3. Select the transfer driven gear shim. Refer to ADJUSTMENT .
  4. Attach the selected transfer drive gear shim to extension case with vaseline.
  5. Attach the selected transfer driven gear shim to extension case with vaseline.
  6. Install the O-ring to the transmission case.
    NOTE:
    • Use new O-rings.
    • Apply CVTF to the O-ring.
      Fig 1: Locating O-Ring
      G08317893Courtesy of SUBARU OF AMERICA, INC.
  7. Apply liquid gasket to extension case seamlessly.

    Liquid gasket: 

    THREE BOND 1215 (Part No. 004403007) or equivalent 

    Fig 2: Identifying Liquid Gasket Applying Areas On Extension Case
    G08317895Courtesy of SUBARU OF AMERICA, INC.
  8. Install the extension case to transmission hanger.

    Tightening torque: 

    25 N.m (2.5 kgf-m, 18.4 ft-lb) 

    Fig 3: Identifying Extension Case Mounting Bolts
    G08317892Courtesy of SUBARU OF AMERICA, INC.
  9. Install the transmission assembly. Refer to INSTALLATION .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.