Ford Expedition 4WD FFV is a four-wheel drive full-size Ford SUV available with a flex-fuel engine. The engine can run on gasoline, E85 ethanol, or any combination of the two. This allows for improved fuel efficiency and fewer emissions. It also has a six-speed SelectShift Automatic transmission and independent rear suspension. Other features include Trailer Sway Control (TSC), SYNC 3 infotainment system, and AdvanceTrac with Roll Stability Control.