BCS Valiant

Differential fluid capacity & service interval

BCS Valiant differential fluid capacity ranges from 4 to 5,5 liters. Service intervals include normal use. The data covers 14 configurations.

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

TypeSpecifications
  • Valiant 600 AR (2019- )
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 600 RS (2019- )
  • Front
  • Use: Normal
  • Capacity 4 liter
  • Valiant L65 AR (2019- )
  • Front
  • Use: Normal
  • Capacity 4 liter
  • Valiant L65 RS (2019- )
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 550 AR (2009-2013)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 550 RS (2009-2013)
  • Front
  • Use: Normal
  • Capacity 4 liter
  • Valiant 650 AR (2009-2013)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 650 RS (2009-2013)
  • Front
  • Use: Normal
  • Capacity 4 liter
  • Valiant V650 AR (2009-2017)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant V650 RS (2009-2017)
  • Front
  • Use: Normal
  • Capacity 4 liter
  • Valiant 400 AR (2001-2009)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 400 AR (2001-2009)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 500 AR (2001-2009)
  • Front
  • Use: Normal
  • Capacity 5,5 liter
  • Valiant 500 RS (2001-2009)
  • Front
  • Use: Normal
  • Capacity 5,5 liter

Additional Notes

  • Across the BCS Valiant lineup, front differential fluid capacity falls into one of two values: 5.5 liters or 4 liters. These figures represent service fill volumes, meaning the amount of fluid required when refilling the differential under normal operating conditions rather than during a full overhaul where residual fluid may not be fully drained.
  • The 5.5-liter front differential capacity appears on the Valiant 400 AR, 500 AR, 550 AR, 650 AR, and V650 AR across model years 2001-2017, indicating a consistent housing size shared among AR-designated variants in those generations.
  • The RS-designated variants of the 550, 650, and V650 — covering model years 2009-2017 — carry a 4-liter front differential capacity, which is notably lower than the 5.5-liter figure specified for their AR counterparts within the same generation and numeric designation.
  • The Valiant 500 RS (2001-2009) is specified at 5.5 liters for the front differential, placing it in alignment with the AR variants of the same era rather than with the 4-liter figure seen on later RS models from 2009 onward.
  • With the introduction of the 600-series from 2019, the capacity split between AR and RS variants continues, but the Valiant 600 AR retains the 5.5-liter figure while the 600 RS is specified at 4 liters, mirroring the pattern established in the 550 and 650 generations.
  • The Valiant L65 variants from 2019 reverse the AR/RS capacity pattern seen elsewhere in the lineup. The L65 AR is specified at 4 liters while the L65 RS carries a 5.5-liter front differential capacity, which is the opposite relationship compared to the 600 AR and 600 RS of the same period.
  • All front differential fluid specifications across the full 2001-2019 range are listed under normal use conditions, meaning the capacities apply to standard service intervals without adjustment for severe-duty or heavy-load operating environments.

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