Detroit DD13 Ultra Low Sulfur Diesel Engine, 2014 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FO-16E313A-MHP ULT 13-Speed Automated Transmission, Double Differential Locks, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 3.90:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R22.5, Airliner Air Ride Suspension, 190 in Wheelbase