Machine description: Detroit DD15TC 6 Cylinder 14.8 L Diesel 560 hp Engine, 16150 Engine hrs, Engine Brake, Allison 4700 RDS Automatic Transmission, Double Differential Locks, 14600 lb Front Axle, 46000 lb Rears, 4.89:1 A... more info about the 2013 Western Star 4900.