Detroit DD15 14.8 L 505 hp Engine, US EPA Label, 12380 Engine hrs, Engine Brake, Eaton Fuller 18-Speed Transmission, Differential Lock, 12000 lb Front Axle, 46000 lb Rears, Air Ride Cab, Aluminum Wheels, 11R22.5, Airliner Air Ride Suspension, 178 in Wheelbase, Air Sliding 5th Wheel