Machine description: Paccar PX-6 6 Cylinder 6.7 L Diesel 250 hp Engine, 2012 US EPA Label, Requires Diesel Exhaust Fluid, Allison 2500HS Automatic Transmission, Differential Lock, 4.63:1 Axle Ratio, Air Ride Cab, 285/70R1... more info about the 2013 Peterbilt 220.