Detroit Series 60 12.7 cid Ultra Low Sulfur Diesel 455 hp Engine, 2006 US EPA Label, Air Conditioner, Cruise Control, Eaton Fuller FRO-14210C 10-Speed Manual Transmission, 12000 lb Front Axle, Meritor TS-23-161R-SRS Drive Axles, 3.73:1 Axle Ratio, Air Ride Cab, 295/75R22.5, Airliner Air Ride Suspension, 176 in Wheelbase, Dual Fuel Tanks