Detroit DD15 6 Cylinder 14.8 L Diesel 475 hp Engine, Positive Air Shutoff, Engine Brake, Eaton Fuller RTLO-18918B 18-Speed Manual Transmission, Differential Lock, 14600 lb Front Axle, 46000 lb Rears, Meritor Drive Axles, 3.91:1 Axle Ratio, Air Ride Cab, 36 in Flat Top Sleeper Cab, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Airliner Air Ride Suspension, 235 in Wheelbase, Air Sliding 5th Wheel, Hour Meter Reads 25931