Cummins C8.3-250 6 Cylinder 8.3 L Diesel 259 hp Engine, 1996 US EPA Label, Allison Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, 33000 lb GVWR, 11R22.5, Spring Suspension, 156 in Wheelbase, PTO, Swab 17 ft Body