Paccar PX-9 6 Cylinder Diesel 330 hp Engine, Requires Diesel Exhaust Fluid, 12272 Engine hrs, Engine Brake, Allison 3000 6-Speed Automated Transmission, Differential Lock, 10000 lb Front Axle, 23000 lb Rears, Dana S23-190 Drive Axles, 4.78:1 Axle Ratio, 33000 lb GVWR, 11R22.5, Hendrickson Air Ride Suspension, 220 in Wheelbase, PTO, Liftgate