Minneapolis-Moline replaced the old FTA model for the year 1939 with the significantly more powerful GT model. Its gasoline engine was a 60-horsepower 6.6-liter four-cylinder – fundamentally the same as before. It had 4+1 gears, and the road speed was limited to 15 km/h; in the version with steel wheels, the highest gear was removed. The design of the GT was modern, but under the bodywork, the technology was older than in the newer smaller models. The brakes were operated by hand levers, as was the clutch. The GT was offered only with a wide front axle in Standard and Industrial versions.

The GTB model introduced in 1947 had 5+1 gears, a 6-volt electrical system, and a revised design. The GTBD had a diesel engine, which was apparently a successfully converted M-M gasoline engine.

In the 1955 GB model, the updates included a 12-volt electrical system, moving the brake pedals to the right side (the clutch still operated with a hand lever), a curved front axle, and wide fenders.

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