Machine description: Detroit DD13 12.8 L 450 hp Engine, Allison 4500 Automated Transmission, 20000 lb Front Axle, 46000 lb Rears, Meritor RT-46-160 Drive Axles, 4.30:1 Axle Ratio, Aluminum Outer Wheels, 425/65R22.5 Front ... more info about the 2019 Freightliner 122SD.