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Home >> Subaru >> 2017 >> Impreza Base, 4D Sedan, Automatic CVT Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> CVT Transaxle >> Front Differential Assembly >> Assembly >> Differential Case Assembly
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Differential Case Assembly

  1. Install the differential bevel gear and differential bevel pinion together with washer, and install the pinion shaft.
    Fig 1: Installing Differential Bevel Gear And Differential Bevel Pinion With Washer
    G11256003Courtesy of SUBARU OF AMERICA, INC.
  2. Measure the backlash, and select the washer.
    1. Install the SUBARU genuine axle shaft to differential case.

      Part No. 38415AA070 AXLE SHAFT 

    2. Using ST1 and ST2, insert the ST2 through the window of differential case. Measure the backlash of the gear.
      NOTE:
      • Measure the backlash by applying a differential bevel pinion tooth between two differential bevel gear teeth.
      • When measuring, fix the differential bevel pinion in place with a screwdriver covered with cloth, or a similar tool.

      Preparation tool: 

      ST1: MAGNET BASE (498247001)

      ST2: DIAL GAUGE (498247100)

      Specification: 

      0.13 - 0.18 mm (0.0051 - 0.0071 in)

      Fig 2: Checking Pinion Gear Backlash
      G11256004Courtesy of SUBARU OF AMERICA, INC.
    3. If the backlash is not within specification, select a washer from the table below and replace.
    Washer
    Part No. Thickness mm (in)
    803038021 0.95 (0.037)
    803038022 1.00 (0.039)
    803038023 1.05 (0.041)
  3. Align the pinion shaft and differential case holes, and install the spring pin to the holes from the hypoid driven gear side using the ST.
    NOTE: Use new spring pin.

    Preparation tool: 

    ST: STRAIGHT PIN REMOVER (899904100)

    Fig 3: Installing Spring Pin To Holes From Hypoid Driven Gear Side
    G11256005Courtesy of SUBARU OF AMERICA, INC.
  4. Using the ST1 and ST2, install the left and right taper roller bearings.

    Preparation tool: 

    ST1: BUSHING 1-2 INSTALLER (499277100)

    ST2: SEAT (398497701)

    Fig 4: Installing Left And Right Taper Roller Bearings
    G11256006Courtesy of SUBARU OF AMERICA, INC.