Hi, I was talking to a fellow Engineer. And we were both thinking about a pair gears for the back two wheels that will kick in once the car is set on its final gear in the transmission. So the concept goes.. If you have a 6 speed transmission Focus, and you have gotten up to speed on the highway the computer will tell the two gears in the back of the vehicle, to switch from high gear to low gear. Therefore lowering the RPM's and increasing the gas milelage. I believe if Ford comes up with this, their reputation of being a manufactor that is trying to produce vehicles that comsume little gas. Again in summary, After the 6th gear is in place, the two gears in the back of the vehicle will switch to from high to low speed so the RPM will drop therefore less rev in the motor and less gas.. Hope Ford tries it!! Thanks and God Speed!