That and thousands of Ford trucks from the U.S. - it allowed Stalin to have motorized logistics while Hitler's was still largely horse-drawn.
http://www.ibiblio.org/hyperwar/USA/ref/LL-Ship/index.html
A detailing of all the American Lend Lease shipments. The sheer quantities are numbing.
Those Ford trucks (and for that matter the T-34 tanks) would have gone nowhere except for the modern refineries built in the Soviet Union by Fred C. Koch - the father of the Koch brothers.
95% of the deuce and a half or larger trucks supplied under lend lease to the Soviet Union were built by Studebaker. GM also shipped about 10,000 trucks to the Reds.
Ford Motor Company produced trucks wound up primarily on the Burma Road, or on duty in the United states. Ford did of course build 280,000 jeeps, 12,200 armored cars, 1690 Sherman tanks, 1035 tank destroyers and 6,790 B-24 bombers