Aight, so maybe i went a little over the top with my title!?
This video is really as basic as it can get. I forgot to Shift+F so please bare with the map and my FPS count. 2nd. Try to ignore the "clicking" of my DFP!
i think your main problem is going to be actually getting the car physically off the ground to allow the user to run the engine and in turn the wheels, without having traction which would move the car.