Paccar PX-8 6 Cylinder 8.3 L Ultra Low Sulfur Diesel 330 hp Engine, 2010 US EPA Label, Requires Diesel Exhaust Fluid, Power Windows, Cruise Control, Air Conditioner, Engine Brake, Eaton Fuller Manual Transmission, Differential Lock, 16540 lb Front Axle, 40000 lb Rears, Spicer RDP41 Drive Axles, 4.63:1 Axle Ratio, 56540 lb GVWR, Aluminum Wheels, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Dual Steering Boxes, Double Frame, Air Trac Air Ride Suspension, 235 in Wheelbase, 137 in Cab to Axle, 256 in Cab to End of Frame