In March 1962, the TC-497 left LeTourneau’s Longview, TX factory for the Army’s Yuma Proving Ground (YPG). The Army had preliminarily accepted the TC-497. However, it needed several more years of testing and modifications. In the image below, you can see 10 of the 58 tires that were sent along to YPG. If you look to the bottom-left corner of the image, you can see LeTourneau’s Electric Drive, which includes the electric motor and driver (gear cluster).