2020 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE

Differential Side Retainer

  1. Install the new differential side retainer oil seal using the ST.
    NOTE:
    • Apply differential gear oil to the differential side retainer oil seal lip.
    • Since the differential side retainer oil seal has an identification mark (R or L), be careful not to mix up the RH and LH when installing.

    Preparation tool:Β 

    ST: DIFFERENTIAL SIDE OIL SEAL INSTALLER (18675AA000)

    G08318154Courtesy of SUBARU OF AMERICA, INC.
  2. Install a new O-ring.
    NOTE: Apply the differential gear oil to O-ring.
    G08318144Courtesy of SUBARU OF AMERICA, INC.
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:

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

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