Ford FX

Transfer case fluid capacity & service interval

Ford FX transfer case fluid capacity is 1,4 liters. Service intervals include checking every 50 hours and changing every 400 hours or 12 months. The data covers 3 configurations.

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

TypeSpecifications
FX 300 (1994- )
  • Use: Normal
  • Capacity 1,4 liter
  • Check 50 hours
  • Change 400 hours/ 12 months
  • Code: (4x4)
FX 375 (1994- )
  • Use: Normal
  • Capacity 1,4 liter
  • Check 50 hours
  • Change 400 hours/ 12 months
  • Code: (4x4)
FX 450 (1994- )
  • Use: Normal
  • Capacity 1,4 liter
  • Check 50 hours
  • Change 400 hours/ 12 months
  • Code: (4x4)

Additional Notes

  • The Ford FX 300, FX 375, and FX 450 each carry a transfer case fluid capacity of 1.4 liters, a figure consistent with a standard service fill rather than a full overhaul quantity.
  • Across all three variants, the check interval is set at 50 hours under normal use conditions, reflecting a relatively frequent inspection schedule typical of working or off-road machinery.
  • The fluid change interval for each variant is 400 hours or 12 months under normal use, whichever comes first, meaning time elapsed can trigger a change even before the hour threshold is reached.
  • The 400-hour change interval is expressed alongside a 12-month calendar limit, so annual operation patterns with lower hour counts still require a fluid change at the one-year mark.
  • All three variants share identical capacity and interval specifications, indicating no differentiation in transfer case servicing requirements across the FX 300, FX 375, and FX 450 configurations starting from 1994.

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