Ford FW

Differential fluid capacity & service interval

Ford FW uses differential fluid with a capacity of 26,4 liters. Service intervals include checking at 100 hours and changing at 500 hours. The data covers 4 configurations.

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

TypeSpecifications
  • FW-20 (1979- )
  • Front
  • Use: Normal
  • Capacity 26,4 liter
  • Check 100 hours
  • Change 500 hours
  • Code: (4x4)
  • FW-30 (1979- )
  • Front
  • Use: Normal
  • Capacity 26,4 liter
  • Check 100 hours
  • Change 500 hours
  • Code: (4x4)
  • FW-40 (1979- )
  • Front
  • Use: Normal
  • Capacity 26,4 liter
  • Check 100 hours
  • Change 500 hours
  • Code: (4x4)
  • FW-60 (1979- )
  • Front
  • Use: Normal
  • Capacity 26,4 liter
  • Check 100 hours
  • Change 500 hours
  • Code: (4x4)

Additional Notes

  • The Ford FW front differential carries a fluid capacity of 26.4 liters across the FW-20, FW-30, FW-40, and FW-60 configurations, a volume consistent with heavy-duty axle housings found on large four-wheel-drive agricultural tractors.
  • A 26.4-liter fill capacity indicates a substantial sump designed for sustained load-bearing operation, as opposed to the smaller reservoirs typical of light-duty or on-highway differentials.
  • The check interval is set at every 100 operating hours under normal use conditions, meaning fluid level inspections are scheduled well before any drain-and-fill service becomes due.
  • The change interval is 500 operating hours under normal use conditions, placing a full fluid exchange at five times the frequency of a routine level check.
  • All four variants — FW-20, FW-30, FW-40, and FW-60 — share identical front differential fluid specifications, with no variation in capacity, check interval, or change interval across the range starting from 1979.

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