Wow I loused that post up badly, let’s try it again:
Most of the vehicles we gave the Soviets were trucks, which they needed badly. We gave them relatively few M4 Sherman tanks. The didn’t need them. They had the T-34, the best tank of the war. It was in production into the 1950’s and was still in use as late as the 90’s.
Tank for tank, a late war T-34 will eat a Sherman for breakfast.
Remember, they relocated all their industry some 800 miles to the East. Indianapolis, Louisville and Detroit were the major centers of war materiel and canned spam shipped to the Eastern front. These were deep inland cities selected for the most serious of war-making capacity ~ and all you had to do was look at what was happening to the Russian territories "deep inland" to see what was up.
The folks designing and commanding the war were not at all confident that we were going to win.