Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 410 hp Engine, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Allison Automatic Transmission, 12000 lb Front Axle, 23000 lb Rears, Meritor RS-23-160 Drive Axles, 4.30:1 Axle Ratio, 35000 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 164 in Wheelbase, Dual Fuel Tanks