Detroit DD15 14.8 L Ultra Low Sulfur Diesel 455 hp Engine, 2010 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Digital Mirrors, Engine Brake, Eaton Fuller FR-15210B 10-Speed Manual Transmission, Differential Lock, 12000 lb Front Axle, 20000 lb Rears, Meritor MT-40-14X Drive Axles, 2.64:1 Axle Ratio, 52000.0 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Auxiliary Power Unit, Aluminum Outer Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 226 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks