Paccar PX-9 6 Cylinder 6.7 L Diesel 260 hp Engine, 2008 US EPA Label, 4819 Engine hrs, Engine Brake, Paccar 1000RDS Automatic Transmission, 7998 lb Front Axle, 11497 lb Rears, 4.10:1 Axle Ratio, 19495.0 lb GVWR, 245/70R19.5, Spring Suspension, 153 in Wheelbase, 10 ft 9 in x 96 in Bed