The T22E1 is a prototype medium tank. It has the standard US 75 mm gun upgraded with a autoloader. Unlike other tanks that have their rate of fire increased with an autoloader the T22E1 has no drawback like a longer reload after a set amount of rounds or that it has to cool down. Though, the 75 mm gun is not as effective as other options available on maps that feature this tank.
The T22E1 was the T22 tank fitted with the turret originally built for the cancelled T20E1 tank,
the main feature was the 75mm gun M3 hooked up to an automatic loader. Although this gun featured a phenomenal 20 rounds per minute rate of fire, the technology was not mature enough to work properly and the gun itself was considered inadequate by that time. The project was suspended and then cancelled in February 1944.
Develpoment of the T20 medium tank, which include the T22 and T23 series, began almost immediately after the M4 Sherman was standardized, as the US Ordnance Department was interested in a successor. Three series of medium tanks were developed, the T20, T22, and T23 where the main difference laid in the chosen transmission. Particularly T22 had Ford GAN V8 engine with M4 type mechanical transmission.