I'm having vibration coming from the shifter it seems to be the worse in third gear. Does't seem to be bad in 1st or 2nd and forth isn't bad either its really only in 3rd and when under hard acceration. Really dont know where to start. I didnt know if this could be casue by a bent input shaft. But i think if it was an input shaft it would do it in all gears..So just looking to see if anyone else had this problem or could give me an idea on wear to start. I know its not tires or alinement becase it gets worse under acceleration, and its not mph related. Any help would be great