Need some help on finding this problem before I have to go threw the whole drive trane which will take forever but I like the car and it runs great . I just changed out the trany in it and I dont know if it was doing this before . When I bought it it the trany would not shift passed first so I never got it fast enough to see.
I did try changing the back tires and it was still the same . That was the first thing to my mind was the tires . I was told by someone it could be the U joints but I could not see anything wrong with them.

befor you get to excited try checking the tirs a showing belt will make those cars vibrate.I have one and it is funny how they all have tranny trouble.check to tires first.then the shocks