Machine description: Cat 6 Cylinder Diesel Engine, Engine Brake, 13-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, 50000 lb GVWR, Aluminum Front Wheels, 11R22.5, Spring Suspension, 172 in Wheelbase, 15 ft... more info about the 1985 Peterbilt 359.