Thanks for the info Djknucklez1, but I'm looking for something more like rigid body dynamics. Although thats an interesting link, I dont see the relationship between that and a car driving. I need something to take the car off-road with. Good controls and the idea that if the tires arent on the ground, the vehicle shouldnt move foreward. as a matter of fact, something to help my vehicle only move in the object x direction and not the world x direction would be useful as well.