Aug 21, 2013 · motorized transfer trolley export 90 ton-Perfect Motorized. The GMC CCKW, also known as "Jimmy", or the G-508 by its Ordnance Supply Catalog nr, [4] was a highly successful series of off-road capable, 21⁄2-ton, 6×6 trucks, built inPerfect numbers to a standardized design (from 1941 to 1945) for the U.S. Army, that saw heavy service