Ford TW

Differential fluid capacity & service interval

Ford TW differential fluid capacity ranges from 7 to 8 liters. Service intervals include checking at 50 hours and changing at 1200 hours. The data covers 6 configurations.

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

TypeSpecifications
  • TW-15 (1983-1990)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • TW-25 (1983-1990)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • TW-35 (1983-1990)
  • Front
  • Use: Normal
  • Capacity 7,5 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • TW-10 (1979-1983)
  • Front
  • Use: Normal
  • Capacity 8 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • TW-20 (1979-1983)
  • Front
  • Use: Normal
  • Capacity 8 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • TW-30 (1979-1983)
  • Front
  • Use: Normal
  • Capacity 7,5 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)

Additional Notes

  • The Ford TW series front differential fluid capacities vary by model, ranging from 7 liters on the TW-15 and TW-25 to 8 liters on the TW-10 and TW-20, with the TW-30 and TW-35 sitting between at 7.5 liters.
  • The TW-10 and TW-20, both produced from 1979-1983, share an identical front differential capacity of 8 liters, making them the highest-capacity configurations across the entire TW series lineup.
  • The TW-15 and TW-25, introduced in 1983, each carry a front differential capacity of 7 liters under normal use conditions, which is the lowest capacity figure recorded across all six configurations.
  • The TW-30 (1979-1983) and TW-35 (1983-1990) both specify a 7.5-liter front differential capacity, meaning the mid-range capacity figure remained consistent across the generational transition between those two models.
  • A front differential fluid check interval of 50 hours applies uniformly across all six TW configurations under normal use conditions, reflecting a relatively frequent monitoring schedule typical for heavy-duty agricultural equipment operating under sustained load.
  • All six configurations share a front differential fluid change interval of 1200 hours under normal use conditions. In agricultural machinery, hour-based intervals are standard because operating time is a more reliable wear indicator than calendar time or distance.
  • The ratio between the check interval (50 hours) and the change interval (1200 hours) means a fluid level check is performed 24 times before a full fluid change is due, indicating a maintenance schedule designed around frequent monitoring rather than frequent replacement.
  • The early-generation TW-10 and TW-20 (1979-1983) carry a larger front differential capacity than their respective successor models, the TW-15 and TW-25 (1983-1990), with a reduction of 1 liter between generations despite identical service intervals.

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