Cat C15 6 Cylinder Diesel Engine, Engine Brake, Eaton Fuller RTLO-18918B 18-Speed Manual Transmission, 13200 lb Front Axle, 46000 lb Rears, Spicer DT463P Drive Axles, 59200 lb GVWR, Air Ride Cab, 62 in Flat Top Sleeper Cab, Aluminum Wheels, 11R24.5, 8-Bag Air Ride Suspension, 244 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks, Hour Meter Reads 21966