It'd do a little better than that. At 32 feet per second per second, after 6 seconds it's falling at over 170 feet per second, which is approximately 120 mph. Less wind resistance, of course, and a Sherman can hardly be considered streamlined. But that's not much of a factor.
You know that the Russians have been known to airdrop their BMD paratroop fighting vehicles with a well-padded driver and gunner inside? Real brave fellas, them Russkies!
-archy-/-