Paccar PX-9 6 Cylinder 8.9 L Diesel 300 hp Engine, 2016 US EPA Label, 10554.4 Engine hrs, Allison 3500 Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, Meritor MS21-14X4 Drive Axles, 5.29:1 Axle Ratio, 33000 lb GVWR, 11R22.5, REYCO Spring Suspension, 190 in Wheelbase, 122 in Cab to Axle, 221 in Cab to End of Frame