AT Main Case: Installation

2014 Subaru Outback 2.5i, Standard TransSECTION Installation
WARNING: This page is about a different variant/trim than selected.
  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
    G08579398Courtesy 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: 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: Installing Spring Retainer And 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
    G08579401Courtesy of SUBARU OF AMERICA, INC.
  9. Install the retaining plate.
  10. Install the snap ring of the reverse brake.
    Fig 5: Identifying Retaining Plate
    G08579402Courtesy of SUBARU OF AMERICA, INC.
  11. Apply compressed air intermittently to check for operation.
    Fig 6: Applying Compressed Air
    G08579403Courtesy 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 Amount Of Drive Plate Compression
      G08579404Courtesy 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.
        Fig 8: Identifying Clearance Between Retaining Plate And Snap Ring
        G08579405Courtesy of SUBARU OF AMERICA, INC.
    3. Select and install a retaining plate so that the value calculated from the dimensions A and B is within the standard.

      T = A + B

      T: Piston stroke

      A: Amount of drive plate compression

      B: Clearance between retaining plate and snap ring

      Initial standard: 

      2.0 - 2.4 mm (0.08 - 0.09 in) 

      Retaining plate
      Part No. Thickness mm (in)
      31567AB100 4.2 (0.165)
      31567AB170 4.4 (0.173)
      31567AB180 4.6 (0.181)
      31567AB190 4.8 (0.189)
      31567AB200 5.0 (0.197)
  13. Install the direct clutch assembly.
    Fig 9: Installing Direct Clutch Assembly
    G05022399Courtesy of SUBARU OF AMERICA, INC.
  14. Install the high & low reverse clutch assembly.
    Fig 10: Installing High & Low Reverse Clutch Assembly
    G05022398Courtesy of SUBARU OF AMERICA, INC.
  15. Install the thrust needle bearing of the high & low reverse clutch.
    Fig 11: Installing Thrust Needle Bearing Of High & Low Reverse Clutch
    G05022397Courtesy of SUBARU OF AMERICA, INC.
  16. Install the middle & rear sun gear assembly.
    Fig 12: Installing Middle & Rear Sun Gear Assembly
    G05022396Courtesy of SUBARU OF AMERICA, INC.
  17. Install the rear carrier assembly.
    Fig 13: Installing Rear Carrier Assembly
    G05022395Courtesy of SUBARU OF AMERICA, INC.
  18. Install the middle carrier assembly.
    Fig 14: Installing Middle Carrier Assembly
    G05022394Courtesy of SUBARU OF AMERICA, INC.
  19. Install the thrust needle bearing of middle carrier assembly.
    Fig 15: Identifying Thrust Needle Bearing Of Middle Carrier Assembly
    G05022393Courtesy of SUBARU OF AMERICA, INC.
  20. Measure the total end play, and select the bearing. Refer to ADJUSTMENT .
  21. Install the input clutch pack assembly to oil pump cover.
    Fig 16: Identifying Input Clutch Pack Assembly And Front Sun Gear Assembly
    G08579413Courtesy of SUBARU OF AMERICA, INC.
  22. Turn the transmission sideways.
  23. Install the oil pump cover.
    1. Apply ATF to the O-ring of input clutch shaft.
    2. Install the oil pump cover to AT main case while supporting the input clutch shaft and oil pump housing with your hand.
      NOTE: Use a new gasket.
RENDER: 1.0x

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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.