Mack MP7 Diesel Engine, 2014 US EPA Label, CARB Compliant, Requires Diesel Exhaust Fluid, Engine Brake, Eaton Fuller 9-Speed Manual Transmission, 20000 lb Front Axle, 46000 lb Rears, 66000 lb GVWR, Aluminum Wheels, 425/65R22.5, Steerable Air Lift Tag Axle, Trailing Tag Axle, Chalmers Suspension, 250 in Wheelbase, McNeilus Mixer Unit