Thanks for the reply, actually the car rig mostly came from the tut you mentioned, very nice rig so far, love the auto roll in the wheels (Now if I could find a tut on suspension).
Here is the blend file with the rig. The controlling bone that sticks out front will steer the front wheels and even turn the drive shaft towards it a little bit to better simulate the entire turning process of the car.
My only problem is the control bone doesnt have the rig move forward or backwards, just left or right. It would be sweet to have one bone do the steering, turning of the entire car, and accelerate and backup. Basically you would tow the car around with this controlling bone.Lots_Bots_1C.blend (428 KB)