Bristol 409

Differential fluid capacity & service interval

Bristol 409 requires 1,7 liters of differential fluid. Service intervals include checking every 6000 miles and changing every 20000 miles or 12 months. The data covers 1 configuration.

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

TypeSpecifications
  • 409 (1965-1967)
  • Rear
  • Use: Normal
  • Capacity 1,7 liter
  • Check 6000 miles
  • Change 20000 miles/ 12 months

Additional Notes

  • The Bristol 409 rear differential holds 1.7 liters of fluid, which is a typical service fill volume for a rear axle of this era and reflects the quantity needed to maintain proper lubrication under normal operating conditions rather than a full overhaul drain-and-fill figure.
  • Under normal use conditions, the Bristol 409 rear differential fluid is specified for a change interval of 20,000 miles or 12 months, whichever comes first, pairing a mileage threshold with a fixed calendar limit to account for fluid degradation over time regardless of distance driven.
  • A check interval of 6,000 miles is specified for the 1965-1967 Bristol 409 rear differential, meaning the fluid level is to be inspected well before the full change interval is reached, allowing for early detection of leaks or consumption between scheduled changes.

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