I have not thrown away the back cat yet! When I came home from work today I decided to get in it and take it down the road just to see what happened and it drove like a dream. I got it up to around 55 and drove it pretty hard a couple of times, and it run and shifted smooth as butter. When I got home I put it in park and it was still idling smooth and around 700 rpms just like it should. I think on the back cat for the $ I will just put a new one on there when I put one on the front with new 02 sensors. The tribute is just to nice a vehicle to just halfway put together. Im just running it like this for a little bit so my wife wont be at home without a ride if something happens while im working. I really appreciate all your help and valid info.