2012 Subaru Tribeca LimitedFACTORY OEM SERVICE PROCEDURE

Differential Case Assembly

  1. Install the washer, differential bevel gear and differential bevel pinion in the differential case (RH). Insert the pinion shaft.
  2. Attach the straight pin in the reverse direction.
    Fig 1: Identifying Differential Case
    G06343036Courtesy of SUBARU OF AMERICA, INC.
  3. Install the washer and differential bevel gear to the differential case (LH). Put the differential case (RH) on the case, and assemble two cases.
  4. Install the hypoid driven gear and secure by tightening the bolt.

    Tightening torque: 

    70 N.m (7.1 kgf-m, 51.6 ft-lb) 

    Fig 2: Identifying Differential Case And Hypoid Driven Gear
    G06343037Courtesy of SUBARU OF AMERICA, INC.
  5. Measurement of backlash (Selection of washer)
    1. Install the SUBARU genuine axle shaft to differential case.

      Part No. 38415AA070 AXLE SHAFT

    2. Measure the gear backlash using ST1 and ST2, and then insert ST2 from the access window of the case.

      ST1 498247001 MAGNET BASE

      ST2 498247100 DIAL GAUGE

      NOTE:
      • Measure the backlash by applying a differential bevel pinion tooth between two differential bevel gear teeth.
      • Fix the differential bevel pinion gear in place with a screwdriver covered with cloth or similar tool when measuring.

      Specification: 

      0.13 - 0.18 mm (0.0051 - 0.0071 in) 

      Fig 3: Measuring Gear Backlash
      G05002724Courtesy of SUBARU OF AMERICA, INC.
    3. If the backlash is not within specification, select a washer from the table below.
      THICKNESS SPECIFICATION CHART

      Washer
      Part No. Thickness mm (in)
      803038021 0.95 (0.037)
      803038022 1.00(0.039)
      803038023 1.05(0.041)
  6. Using the ST, install the taper roller bearing.

    ST 398487700 DRIFT

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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