The Ford Model TT is a truck made by the Ford Motor Company. It was rated at one ton. It was based on the Ford Model T, but with a heavier frame and rear axle. The rear axle had a worm drive and crown wheel, unlike the Ford Model T's Crown wheel and pinion. The worm was located at the end of the driveshaft and above the crown wheel. The wheelbase of the car was 100 inches (2,500 mm) and the wheelbase of the TT was 125 inches (3,200 mm). It was often equipped with a 'ruckstell axle' or some other accessory gearbox which allowed the truck to have an intermediate gear between low and high, which was useful for hill climbing. It was often sold as a chassis with the buyer supplying the truck body as needed. Mass production with Ford produced bodies ran from 1925 to 1927, but production of the Ford TT had started with the first TT chassis being released in 1917. In 1923, it cost $380. In 1925, a hand operated windshield wiper was added.

It was very durable for the time, but slow when compared to other trucks. With standard gearing, a speed of not more than 15 mph (24 km/h). was recommended, and with special gearing, a speed of not more than 22 mph (35 km/h) was recommended, according to Ford Dealers Data Book 1923. Standard worm gear ratio was 7.25:1, special gearing 5.17:1. Because of this, accessory catalogs offered items to help give the Model TT more power.

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