Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2018 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit dt12-1650-0h1 12-Speed Automated Transmission, Differential Lock, 13300 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 3.08:1 Axle Ratio, 53300.0 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner 4-Bag Air Ride Suspension, 235 in Wheelbase, Air Sliding 5th Wheel