Install the washer, differential bevel gear and differential bevel pinion in the differential case (RH). Insert the pinion shaft.
Attach the straight pin in the reverse direction.

Fig 1: Attaching Straight Pin
Courtesy of SUBARU OF AMERICA, INC.
Install the washer and differential bevel gear to the differential case (LH). Put the differential case (RH) on the case, and assemble two cases.
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: Identifying Hypoid Driven Gear And Differential Case
Courtesy of SUBARU OF AMERICA, INC.

Measurement of backlash (Selection of washer)

Install the SUBARU genuine axle shaft to differential case.
Part No. 38415AA070 AXLE SHAFT
Measure the gear backlash using ST1 and ST2, and then insert the ST2 though the access window of case.
ST1 498247001 MAGNET BASE

ST2 498247100 DIAL GAUGE
NOTE:
- Place the tooth of the differential bevel pinion against 2 teeth of the differential bevel gear, and measure the backlash.
- When measuring, fix the differential bevel pinion gear in place with a screwdriver covered with waste cloth, or a similar tool.
Standard:

0.13 - 0.18 mm (0.0051 - 0.0071 in)

Fig 3: Identifying Differential Bevel Pinion
Courtesy of SUBARU OF AMERICA, INC.

If the backlash is out of specification, select a washer from the table below.

THICKNESS CHART

Using the ST, install the taper roller bearing.
ST 398487700 INSTALLER

Fig 4: Identifying Taper Roller Bearing
Courtesy of SUBARU OF AMERICA, INC.

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.

Safety Warning

Differential Case Assembly