Differential Gear Oil: Inspection

Lift up the vehicle.
Remove the filler plug, and then check the gear oil. Replace the gear oil if it is contaminated, deteriorated or cloudy. Ref. to DIFFERENTIALS>Differential Gear Oil>REPLACEMENT .
Check that the gear oil level is within -5 mm (-0.2 in) from the bottom of the filler plug hole. If the level is low, make sure that there is no oil leakage and refill up to the bottom of filler plug hole.
NOTE: On VA1-types at factory settings, the oil level may be within -14 mm (-0.6 in) from the bottom of the filler plug. This is at normal level, requiring no oil refill.

T-type

Fig 1: Identifying Differential Gear Oil Filler Plug (T-Type)
Courtesy of SUBARU OF AMERICA, INC.
VA1-type

Fig 2: Identifying Differential Gear Oil Filler Plug (VA1-Type)
Courtesy of SUBARU OF AMERICA, INC.
Install the filler plug.
NOTE:
- For the T-type, degrease the thread portion sufficiently and apply liquid gasket to the filler plug.
  Liquid gasket:
  
  THREE BOND 1105 (Part No. 004403010) or equivalent
- For VA1 type, use a new gasket.
  Tightening torque:
  
  T-type:
  
  49 N.m (5.0 kgf-m, 36.1 ft-lb)
  
  VA1-type:
  
  50 N.m (5.1 kgf-m, 36.9 ft-lb)