noo its not the tires, i dont have cruise control, and im not intentionally abusing it...ive only noticed it if i maybe spin in the rain or if its icy...hah i wish i had a tranny swap in my future, but the car is under warranty and im sure ford wudnt do that for me...but it looks like its gunna stay a mystery until something happens(if anything does) and then well find out if it is the diff. or if its something else...but i think im gunna have that checked out because its actually going into the shop soon cuz I think there is something wrong with my tranny, and im having that common vibration problem wen its in drive at a stand-still