2013 Subaru TribecaFACTORY OEM SERVICE PROCEDURE

AT Main Case: Installation

  1. Apply ATF to the new seal ring.
  2. Install the thrust bearing and new seal ring to the drum support.
    Fig 1: Identifying Thrust Bearing And Seal Ring
    G08545226Courtesy of SUBARU OF AMERICA, INC.
  3. Install the reverse brake piston.
    NOTE: Apply ATF onto the piston sliding surface.

    ST1 18762AA000 COMPRESSOR SPECIAL TOOL

    ST2 18765AA000 COMPRESSOR SUPPORT

    ST3 18763AA000 COMPRESSOR SHAFT

  4. Install the return spring.
    Fig 2: Removing/Installing Return Spring
    G05022404Courtesy of SUBARU OF AMERICA, INC.
  5. Install the spring retainer and snap ring.

    ST1 18762AA000 COMPRESSOR SPECIAL TOOL

    ST2 18765AA000 COMPRESSOR SUPPORT

    ST3 18763AA000 COMPRESSOR SHAFT

    Fig 3: Removing/Installing Reverse Brake Spring Retainer Snap Ring
    G05022402Courtesy of SUBARU OF AMERICA, INC.
  6. Install the dish plate.
    NOTE: When installing, make sure that the identification mark is facing the rear side of transmission.
  7. Install the drive plate and driven plate.
    NOTE: When the reverse brake is disassembled, use a new drive plate and driven plate set.
  8. Install the leaf spring.
    Fig 4: Installing Leaf Spring
    G08545229Courtesy of SUBARU OF AMERICA, INC.
  9. Install the retaining plate.
  10. Install the snap ring of the reverse brake.
    Fig 5: Identifying Reverse Brake Snap Ring
    G05022400Courtesy of SUBARU OF AMERICA, INC.
  11. Apply compressed air intermittently to check for operation.
    Fig 6: Applying Compressed Air
    G05022405Courtesy of SUBARU OF AMERICA, INC.
  12. Check the piston stroke.
    1. Check the amount of drive plate compression "A" described in the wave clutch set of repair parts.
      Fig 7: Identifying Drive Plate Compression Length
      G08545232Courtesy of SUBARU OF AMERICA, INC.
    2. Measure the clearance "B" between the retaining plate and snap ring using a thickness gauge.
      NOTE:
      • Set shims of the same thickness on both sides so that the retaining plate will not tilt.
      • Do not push the shim down with force to a point where the waves on the drive plate will become crushed.
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.

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