Cummins ISX15 6 Cylinder 15 L Diesel 400 hp Engine, Requires Diesel Exhaust Fluid, 17770 Engine hrs, Exhaust Brake, Eaton Fuller FM-15E310B Automatic Transmission, 12000 lb Front Axle, 22700 lb Rears, Dana S23-190 Drive Axles, 2.53:1 Axle Ratio, 34700 lb GVWR, 275/80R22.5, 156 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks