Jeep MB / GPW

Manual transmission fluid capacity & service interval

Jeep MB / GPW manual transmission fluid capacity is 0,71 liter. Service intervals occur every 10000 km. The data covers 2 configurations.

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

TypeSpecifications
Ford Model GPW (1941-1945)
  • Use: Normal
  • Capacity 0,71 liter
  • Change 10000 km
  • Code: 3/1
Willys- Overland model MB (1941-1945)
  • Use: Normal
  • Capacity 0,71 liter
  • Change 10000 km
  • Code: 3/1

Additional Notes

  • The Jeep MB / GPW manual transmission fluid capacity is 0.71 liter across both the Ford Model GPW and the Willys-Overland Model MB variants produced from 1941-1945. A capacity at this level is characteristic of a compact, light-duty gearbox, consistent with the small three-speed transmission units fitted to these vehicles.
  • The 0.71 liter figure represents a service fill volume, meaning the amount of fluid used during a routine drain-and-refill service rather than a full overhaul rebuild quantity, which would typically account for additional fluid retained in passages and components.
  • The Ford Model GPW and the Willys-Overland Model MB share an identical fluid capacity of 0.71 liter, reflecting the deliberate mechanical standardization between the two manufacturers, who produced functionally interchangeable vehicles under wartime procurement requirements.
  • The specified change interval for both variants is 10,000 km under normal use conditions. Normal use, as a service classification, generally refers to operation within typical load, temperature, and duty-cycle parameters rather than sustained extreme or high-stress conditions.
  • Both the GPW and MB specifications carry the same 10,000 km interval without a separate severe-use interval listed, and both are assigned the normal use condition designation for the transmission fluid change schedule.

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