Mercedes 6 Cylinder Diesel 370 hp Engine, 2005 US EPA Label, 21311.7 Engine hrs, Engine Brake, Allison 4500 6-Speed Automatic Transmission, 20009 lb Front Axle, 40000 lb Rears, Meritor RT-40-145 Drive Axles, 4.88:1 Axle Ratio, 72350 lb GVWR, 425/65R22.5 Front Tires, 11R22.5 Rear Tires, Dual Steering Boxes, Double Frame, Tuff Trac Spring Suspension, PTO, Hydraulic System, site mixer body