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

Manual transmission fluid capacity & service interval

Subaru Legacy / Outback, BE, BH, BT (USA / CAN) manual transmission fluid capacity is 3,5 liters. Service intervals include checking every 30000 miles or 30 months and changing every 15000 miles. The data covers 4 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)
  • Manual/transferbox
  • Use: Normal
  • Capacity 3,5 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
  • Legacy / Outback 3.0 4WD (2000-2004)
  • Manual/transferbox
  • Use: Severe
  • Capacity 3,5 liter
  • Change 15000 miles
  • Code: 5/1
  • Legacy / Outback 2.5 4WD (1999-2004)
  • Manual/transferbox
  • Use: Normal
  • Capacity 3,5 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
  • Legacy / Outback 2.5 4WD (1999-2004)
  • Manual/transferbox
  • Use: Severe
  • Capacity 3,5 liter
  • Change 15000 miles
  • Code: 5/1

Additional Notes

  • Both the 2.5 4WD and 3.0 4WD configurations share an identical manual transaxle and transfer box fluid capacity of 3.5 liters, covering the combined volume of the transaxle and transfer box as a single service fill figure.
  • The Subaru Legacy / Outback BE/BH/BT 2.5 4WD spans model years 1999-2004, while the 3.0 4WD variant enters the specification range from 2000-2004, reflecting a later introduction of the six-cylinder engine in the lineup.
  • Under normal use conditions, the service interval for both engine configurations is a fluid level check at 30,000 miles or 30 months, whichever comes first, rather than a full fluid change.
  • Under severe use conditions, the interval shifts to a full fluid change at 15,000 miles for both the 2.5 and 3.0 4WD configurations, cutting the normal-use mileage interval in half.
  • The 3.5-liter capacity figure applies to the transaxle and transfer box together, meaning a service fill at that volume accounts for both units rather than the transaxle alone.
  • The severe-use interval of 15,000 miles specifies a fluid change, whereas the normal-use interval at 30,000 miles specifies only a check, indicating a meaningful procedural difference between the two service conditions beyond just mileage frequency.

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