Ford took one highly successful, well designed, mechanically simple tank already in mass production and tried to improve on it with a total redesign.
M26 Pershing - Wikipedia
M4 Sherman - Wikipedia
What is the difference between a regular Sherman tank and an upgraded Sherman tank (M4A3E8, etc.)? - Quora
Ford-M1918-WWI-Tank, Vehicles
Sherman tank, Description, History, & Facts
Raketenjagdpanzer-2 missile tank (1966)
T-26 - Wikipedia
Ford 3-man Light Tank - Tank Encyclopedia
Tankette - Wikipedia
Ford 3-ton Tank
WW2 US Medium Tanks Archives - Tank Encyclopedia
Ford 3-man Light Tank - Tank Encyclopedia
Soviet T-60 (1941)
Cold War French Prototypes Archives - Tank Encyclopedia