We shipped the Russian 6000 M4A2s. These Shermans were diesel powered at the request of the Soviets. The balance of armor sent the Soviets were mostly M3s and some odds and ends.
A study out a few years ago said that 80% of the heavy tanks defending Moscow in winter 41/42 were Brit or American. I don’t know what that means if we didn’t’ have any heavy tanks unless they were referring to the Grant/Lee.