2021 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE

Transmission Case: Installation

  1. Select the reduction drive gear shim. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Reduction Drive Gear>ADJUSTMENT .
  2. Remove the transmission case, and install the selected reduction drive gear shim to the reduction drive gear.
  3. Install new O-rings to the reverse clutch housing and drive pinion retainer.
    NOTE: Apply CVTF to the O-rings.
  4. Install a new seal ring to the transmission case.
    NOTE: Apply CVTF to the seal rings.
  5. Install a new O-ring to the oil pressure pipe.
    NOTE: Apply CVTF to the O-rings.
  6. Temporarily install the oil baffle with bolts, and then install the oil pressure pipe.
    G11265665Courtesy of SUBARU OF AMERICA, INC.
  7. Apply liquid gasket to the mating surface of the transmission case as shown in the figure, and temporarily install the transmission case.
    NOTE:
    • Before applying liquid gasket, degrease the old liquid gasket seal surface of the transmission case and converter case.
    • Install within 5 min. after applying liquid gasket.

    Liquid gasket: 

    THREE BOND 1215B or equivalent

    G13225859Courtesy of SUBARU OF AMERICA, INC.
  8. Tighten the bolts evenly.

    Tightening torque: 

    22 N.m (2.2 kgf.m, 16.2 ft.lb)

  9. Install the oil cooler pipe using a new O-ring.
    NOTE: Apply CVTF to the O-rings.

    Tightening torque: 

    25 N.m (2.5 kgf.m, 18.4 ft.lb)

  10. Tighten the bolt securing the oil baffle, and install the remaining bolts.

    Tightening torque: 

    16 N.m (1.6 kgf.m, 11.8 ft.lb)

  11. Install the transmission control device. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Transmission Control Device>INSTALLATION .
  12. Install the oil pan and oil strainer. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Oil Pan>INSTALLATION .
  13. Install the reduction driven gear. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Reduction Driven Gear>INSTALLATION .
  14. Install the parking pawl. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Parking Pawl>INSTALLATION .
  15. Install the transfer driven gear. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Transfer Driven Gear>INSTALLATION .
  16. Install the transfer clutch. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Transfer Clutch>INSTALLATION .
  17. Install the extension case. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Extension Case>INSTALLATION .
  18. Install the electric oil pump. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Electric Fluid Pump>INSTALLATION .
  19. Install the inhibitor switch. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Inhibitor Switch>INSTALLATION .
  20. Install the secondary speed sensor. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Secondary Speed Sensor>INSTALLATION .
  21. Install the primary speed sensor. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Primary Speed Sensor>INSTALLATION .
  22. Install the turbine speed sensor. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Turbine Speed Sensor>INSTALLATION .
  23. Install the transmission harness. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Transmission Harness>INSTALLATION .
  24. Install the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Control Valve Body>INSTALLATION .
  25. Install the air breather hose. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Air Breather Hose>INSTALLATION .
  26. Install the transmission body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Transmission Assembly>INSTALLATION .
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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.