The Unistar, billed by International as the Universal Highway Tractor was based on the Transtar CO-4070A 4x2, but with a modified grille, bumper, and front corner design. It’s main feature was a driving front axle with overrunning clutch to give it excellent traction in all conditions. The engine was the Cummins NTC-300, a special “torque-balanced” variation of the NTC-335. The standard transmission was a Fuller 9-speed with up to 13-speeds optional. The Unistar could be combined with a Jifflox trailing-axle converter so that it could be switched quickly from 4x4 to 6x4 layout. The engine offerings for the Unistar were expanded in 1972, to a range of Cummins diesels from 255-370 hp and Detroit Diesels from 260-318 hp.
References / sourcesEdit
- Crismon, Frederick W. (1995). International Trucks. Motorbooks International, Osceola, Wisconsin.
- Mroz, Albert (1996). The Illustrated Encyclopedia of American Trucks and Commercial Vehicles. Krause Publications, Iola, Wisconsin.
- Hays Antique Truck Museum, Woodland, California
- Heidrick Ag History Center, Woodland, California
- American Truck Historical Society
- International Trucks
- Navistar webpage