Subaru Legacy / Outback, BE, BH, BT (USA / CAN)

Differential fluid capacity & service interval

Subaru Legacy / Outback, BE, BH, BT (USA / CAN) differential fluid capacity ranges from 0,8 to 1,2 liters. Service intervals include checking every 30000 miles or 30 months and changing every 15000 miles. The data covers 8 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • Legacy / Outback 3.0 4WD (2000-2004)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Legacy / Outback 3.0 4WD (2000-2004)
  • From automatic
  • Use: Severe
  • Capacity 1,2 liter
  • Change 15000 miles
  • Legacy / Outback 3.0 4WD (2000-2004)
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Code: (4x4)
  • Legacy / Outback 3.0 4WD (2000-2004)
  • Rear
  • Use: Severe
  • Capacity 0,8 liter
  • Change 15000 miles
  • Code: (4x4)
  • Legacy / Outback 2.5 4WD (1999-2004)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Legacy / Outback 2.5 4WD (1999-2004)
  • From automatic
  • Use: Severe
  • Capacity 1,2 liter
  • Change 15000 miles
  • Legacy / Outback 2.5 4WD (1999-2004)
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Code: (4x4)
  • Legacy / Outback 2.5 4WD (1999-2004)
  • Rear
  • Use: Severe
  • Capacity 0,8 liter
  • Change 15000 miles
  • Code: (4x4)

Additional Notes

  • The front differential (sourced from the automatic transmission) holds 1.2 liters across both the 2.5 and 3.0 4WD configurations, while the rear differential holds a smaller 0.8 liters, reflecting the distinct physical size and gear set demands of each unit.
  • Under normal use conditions, neither the front nor rear differential fluid requires a change interval — only a check at 30,000 miles or 30 months, whichever comes first, applies to both the 2.5 and 3.0 4WD variants.
  • Under severe use conditions, both the front and rear differentials on the 2.5 and 3.0 4WD variants carry a fluid change interval of 15,000 miles, which is half the distance at which a normal-use check is scheduled.
  • The Subaru Legacy / Outback BE/BH/BT 2.5 4WD differential specifications cover model years 1999-2004, whereas the 3.0 4WD specifications begin from 2000-2004, meaning the 3.0 engine variant was not present in the first year of the generation covered here.
  • The 0.8-liter rear differential capacity is consistent across both the 2.5 and 3.0 engine variants, indicating a shared rear differential unit regardless of the front engine displacement.
  • The severe-use interval specifies only a fluid change at 15,000 miles, with no parallel inspection-only option, whereas the normal-use schedule specifies only a check with no mandatory change mileage listed.

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