Bristol 405

Manual transmission fluid capacity & service interval

Bristol 405 manual transmission fluid capacity is 1,4-1,7 liters. Service intervals include checking at 3000 miles and changing at 6000 miles. The data covers 1 configuration.

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

TypeSpecifications
  • 405 (1958-1961)
  • With overdrive
  • Use: Normal
  • Capacity 1,4-1,7 liter
  • Check 3000 miles
  • Change 6000 miles
  • Code: BWCR/11

Additional Notes

  • The Bristol 405 manual transmission with overdrive takes between 1.4 and 1.7 liters of fluid, a range that reflects the fill tolerance across the overdrive unit and the main gearbox combined rather than a single fixed volume.
  • The 0.3-liter spread between the minimum and maximum capacity figures suggests that the overdrive mechanism adds variability to the total fill, since a conventional manual gearbox alone would typically have a more precise single-value capacity.
  • Under normal use conditions, a fluid level check is specified at every 3,000 miles, which places inspection frequency at half the interval of the full drain-and-refill cycle.
  • The change interval under normal use is set at 6,000 miles, meaning a full fluid replacement occurs twice as often as many mid-century vehicles of comparable design would require.

Other Systems