T22

Development of the T20 medium tank led into refining the lessons learned and the creation of the T22. Two pilot T22 medium tanks were completed in June 1943. They differed from the T20 in that used the power train components of the M4A3, including some internal rearrangements of the tank’s batteries and the auxiliary generator. The T22 also had a lower top speed than the T20. However, the pilots were still very similar to the T20. The first pilot would later had its turret modified for mounting of the 75 mm autoloader. This tank became designated T22E1. However, in late 1943, the 75 mm gun was deemed inadequate for a medium tank. In February 1944, the T22 project was suspended.

T22E1

Just about every module from the T20 carries over into the T22. Like the T20, three different guns were meant to be mounted on this tank. However, the 3-Inch gun was never mounted. Similarly, while the 75 mm M3 was never meant to be mounted without the autoloader, I think it should make for a suitable stock weapon.

The only upgrade from the T20 is the addition of a new top 76 mm gun. However, this tank should hopefully see its major differences in terms of its handling. It’d be very easy to give this tank superior maneuverability compared to the T20, in addition to gun handling and accuracy, reload speeds, and generally every single soft stat. While the tank is historically 8 km/h slower than the T20, I don’t think it’d be too egregious to make its top speed 48 km/h too, for balance.

And while neiter 76 mm gun were meant for the tank at this stage of development, I think it's necessary to help balance the tank.

Guns: 75 mm Gun M3; 75 mm Gun M3 with automatic loader; 3-Inch Gun M7; 76 mm Gun M1A1; 

76 mm Gun M1A2

Engines: Ford GAF (500 hp); Ford GAN (525 hp)

Turrets (Turret Armor (mm)): T22 (89/63/63); T22E1 (89/63/63)

Suspensions/Alternate Hulls, Total Weight (metric tons): T22 HVSS (31.43); T22E1 HVSS (30.84)

Hull Armor (mm): 63/50/38

Top Speed: 48 km/h

Crew: 5 (Driver; Gunner; Loader; Commander; Radio)

Parent: T20
Children: T23

Sources:

Hunnicutt, R. P. Pershing, 2015