Differential Gear Oil: Replacement

CAUTION:

Gear oil is extremely hot just after driving. Be wary of receiving burns.
Be careful not to spill the differential gear oil on exhaust pipe. If gear oil is spilled, wipe it off completely.

Disconnect the ground cable from battery. < Ref. to BATTERY , NOTE, Note. >
Lift up the vehicle.
Disconnect the oil temperature sensor connector. (T-type (H5))

Fig 1: Identifying Oil Temperature Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the drain plug and filler plug or the oil temperature sensor, and drain the gear oil.
- T-type (B1, B2)
  
  Fig 2: Identifying Filler And Drain Plug
  Courtesy of SUBARU OF AMERICA, INC.
- T-type (H5)
  
  Fig 3: Identifying Oil Temperature Sensor And Drain Plug
  Courtesy of SUBARU OF AMERICA, INC.
Install the drain plug.
NOTE:
- Degrease the thread portion of B1 and B2 sufficiently and apply liquid gasket to the filler plug.
  Liquid gasket:
  
  THREE BOND 1105 (Part No. 004403010) or equivalent
- Use a new gasket for H5.
  Tightening torque:
  
  B1, B2
  
  49 N.m (5.0 kgf-m, 36.1 ft-lb)
  
  H5
  
  60 N.m (6.1 kgf-m, 44.3 ft-lb)
Fill the differential carrier with gear oil to the bottom of filler plug hole or the oil temperature sensor hole.
NOTE: Carefully refill gear oil while watching the level. Excessive or insufficient oil must be avoided.

Recommended gear oil:

< Ref. to SPECIFICATION , General Description. >

Oil capacity:

B1, B2

0.8 L (0.8 US qt, 0.7 Imp qt)

H5

1.0 L (1.1 US qt, 0.9 Imp qt)
- T-type (B1, B2)
  
  Fig 4: Locating Gear Oil Level - T Type (B1, B2)
  Courtesy of SUBARU OF AMERICA, INC.
- T-type (H5)
  
  Fig 5: Locating Gear Oil Level - T Type (H5)
  Courtesy of SUBARU OF AMERICA, INC.
Install the filler plug or the oil temperature sensor.
NOTE:
- Degrease the thread portion of B1 and B2 sufficiently and apply liquid gasket to the filler plug.
  Liquid gasket:
  
  THREE BOND 1105 (Part No. 004403010) or equivalent
- Use a new gasket for H5.
  Tightening torque:
  
  B1, B2
  
  49 N.m (5.0 kgf-m, 36.1 ft-lb)
  
  H5
  
  60 N.m (6.1 kgf-m, 44.3 ft-lb)