Cummins ISB 6 Cylinder 6.7 L Diesel 220 hp Engine, Requires Diesel Exhaust Fluid, Allison 2200 Automatic Transmission, 5.56:1 Axle Ratio, 11R22.5, Airliner Air Ride Suspension, 270 in Wheelbase, 26 ft x 102 in Wide x 108 in High Body, Curbside Door, Liftgate