2013 Subaru Forester X, Automatic TransFACTORY 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: Attaching Straight Pin
    G08564114Courtesy of SUBARU OF AMERICA, INC.
  3. Install the washer and differential bevel gear to the differential case (LH). Put the differential case (LH) on the differential case (RH), and assemble the two cases.
  4. Install the hypoid driven gear and secure by tightening the bolt.

    Tightening torque: 

    62 N.m (6.3 kgf-m, 45.7 ft-lb) 

    Fig 2: Installing Hypoid Driven Gear Using Special Tool
    G08564115Courtesy 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 the ST2 though the access window of case.
      NOTE:
      • Measure the backlash by applying a differential bevel pinion tooth between two differential bevel gear teeth.
      • When measuring, fix the differential bevel pinion gear in place with a screwdriver covered with cloth, or a similar tool.

      Standard: 

      0.13 - 0.18 mm (0.0051 - 0.0071 in) 

      ST1 498247001 MAGNET BASE

      ST2 498247100 DIAL GAUGE

      Fig 3: Measuring Gear Backlash Using Special Tools
      G05002724Courtesy of SUBARU OF AMERICA, INC.
    3. If the backlash is not within specification, select a washer from the table below.
    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 INSTALLER

    Fig 4: Installing Taper Roller Bearing Using Special Tool
    G08564117Courtesy of SUBARU OF AMERICA, INC.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.