Cummins ISB 6 Cylinder 6.7 L Ultra Low Sulfur Diesel 250 hp Engine, 2016 US EPA Label, Requires Diesel Exhaust Fluid, Allison 2500 Automatic Transmission, 10000 lb Front Axle, 19000 lb Rears, 5.56:1 Axle Ratio, 26000 lb GVWR, 11R22.5, Air Ride Suspension, 270 in Wheelbase, Morgan 26 ft x 102 in Wide x 103 in High Body, Liftgate