Bristol 411

Differential fluid capacity & service interval

Bristol 411 uses differential fluid with a capacity of 2 liters. Service intervals include checking every 4000 miles or 4 months and changing every 20000 miles or 12 months. The data covers 2 configurations.

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

TypeSpecifications
  • 411, 411/7612122 (1973-1976)
  • Rear, limited slip
  • Use: Normal
  • Capacity 2 liter
  • Check 4000 miles/ 4 months
  • Change 20000 miles/ 12 months
  • 411 (1969-1973)
  • Rear, limited slip
  • Use: Normal
  • Capacity 2 liter
  • Check 4000 miles/ 4 months
  • Change 20000 miles/ 12 months

Additional Notes

  • The Bristol 411 carries a 2-liter rear differential fluid capacity across both the 1969-1973 and 1973-1976 configurations, which is a relatively modest fill volume consistent with a compact rear axle housing rather than a heavy-duty or truck-type differential.
  • Both configurations specify a check interval of 4,000 miles or 4 months, whichever comes first, under normal use conditions, reflecting a time-based threshold alongside a mileage threshold for the same service event.
  • The change interval for both configurations is set at 20,000 miles or 12 months under normal use, meaning a full fluid drain and refill is expected at least once per year regardless of mileage accumulation.
  • Both rear differentials are identified as limited slip units, which is a relevant detail because limited slip differentials typically require fluid formulated with friction modifier additives, distinguishing the service requirement from a standard open differential.
  • The 1973-1976 row carries the additional identifier 411/7612122 alongside the base 411 designation, indicating a specific variant or production series within that model year span sharing the same 2-liter capacity and service intervals as the earlier 1969-1973 configuration.

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