The MB-2 Tow Tractor is an aircraft towing vehicle used by the United States and Allied Air Forces. There are several models of the MB-2 tractor, with weight characteristics between 40,000lbs and 54,000lbs. The first generation was delivered in 1968 to the US Air Force by the Oshkosh Truck Corporation. Oshkosh delivered a total of 72 vehicles under that contract. Since then, several manufacturer's have produced the MB-2 vehicle, including Stewart & Stevenson, Grove Corporation, and FMC Technologies(now JBT AeroTech). The Air Force also purchases remanufactured MB-2 tow tractors.