Differential Case Assembly

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

Fig 1: Installing Straight Pin
Courtesy of SUBARU OF AMERICA, INC.
Install the washer and differential bevel gear to the differential case (LH). Then put the case over the differential case (RH), and connect both cases.
Install the crown gear and secure by tightening the bolt.
Standard tightening torque:

62 N.m (6.3 kgf-m, 45.6 ft-lb)

Fig 2: Installing Crown Gear
Courtesy of SUBARU OF AMERICA, INC.
Measurement of backlash (Selection of washer)
1. Measure the gear backlash with ST1 and ST2, and insert ST2 through the access window of the case.
  ST1 498247001 MAGNET BASE
  
  ST2 498247100 DIAL GAUGE
  NOTE:
  - Measure the backlash by applying a pinion tooth between two bevel gear teeth.
  - Fix bevel pinion gear in place with a screwdriver or similar tool when measuring.
  Standard value:
  
  0.13 - 0.18 mm (0.0051 - 0.0071 in)
  
  Fig 3: Measuring Backlash
  Courtesy of SUBARU OF AMERICA, INC.
2. If backlash is not as specified, select a washer from the table below.
  
  Fig 4: Washer Thickness Table
  Courtesy of SUBARU OF AMERICA, INC.
Using ST, install taper roller bearing.
ST 398437700 DRIFT

Fig 5: Installing Taper Roller Bearing
Courtesy of SUBARU OF AMERICA, INC.