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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Manual Transaxle & Differential (TY751)) >> Oil Seal >> Replacement

Oil Seal: Replacement

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the ground terminal from battery sensor. Refer to NOTE>NOTE>BATTERY .
  2. Lift up the vehicle.
  3. Clean the transmission exterior.
  4. Using the TORX® bit T70, remove the drain plug, and drain the transmission gear oil completely.
    CAUTION:
    • Immediately after the vehicle has been running or after idling for a long time, the gear oil will be hot. Be careful not to receive burns.
    • Be careful not to spill the gear oil on the exhaust pipe, to prevent emission of smoke or causing a fire. If gear oil is spilled, wipe it off completely.
  5. Attach the drain plug using TORX® bit T70.
    NOTE: Use a new gasket.

    Tightening torque: 

    44 N.m (4.5 kgf-m, 32.5 ft-lb) (aluminum gasket, silver)

    70 N.m (7.1 kgf-m, 51.6 ft-lb) (copper gasket, brown)

    70 N.m (7.1 kgf-m, 51.6 ft-lb) (metal gasket, black)

    G05332645Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the rear exhaust pipe. Refer to EXHAUST (EXCEPT FOR STI)>REAR EXHAUST PIPE>REMOVAL .
  7. Remove the center exhaust cover.
    G10268648Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the propeller shaft. Refer to DRIVE SHAFT SYSTEM>PROPELLER SHAFT>REMOVAL .
  9. Using the ST, remove the oil seal.
    ST 398527700 PULLER ASSY
    G13261449Courtesy of SUBARU OF AMERICA, INC.
  10. Using the ST, install the oil seal.
    NOTE:
    • When grease is not applied to the oil seal lips, apply the transmission gear oil to the oil seal lips.
    • Use a new oil seal.
    ST 498057300 INSTALLER
    G06652294Courtesy of SUBARU OF AMERICA, INC.
  11. Install the propeller shaft. Refer to DRIVE SHAFT SYSTEM>PROPELLER SHAFT>INSTALLATION .
  12. Install the center exhaust cover.

    Tightening torque: 

    18 N.m (1.8 kgf-m, 13.3 ft-lb)

  13. Install the rear exhaust pipe. Refer to EXHAUST (EXCEPT FOR STI)>REAR EXHAUST PIPE>INSTALLATION .
  14. Lower the vehicle.
  15. Pour in transmission gear oil and check the oil level. Refer to MANUAL TRANSMISSION AND DIFFERENTIAL (6MT) (TY75)>TRANSMISSION GEAR OIL .
  16. Connect the ground terminal to battery sensor. Refer to NOTE>NOTE>BATTERY .