Detroit DD15 6 Cylinder 14.8 L Diesel Engine, 2009 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRO-15210B Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor Drive Axles, 3.90:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 11R22.5, Airliner Air Ride Suspension, 168 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks