Mechanical issues with V-10

Thanks again for responses. I drove unit again today. Vibration even begins at 5 mph. After a 10-15 min. drive i admit it may not be transmission related. i have no engine lights. It will take another spin for me to be even clearer. I usually go for the chevy's. I think this ford has the I-beam steering set up below. This is another issue. There seems to be some play slop in the steering that has always been a priority with me. I guess even at 45k miles there could be some loose parts in front end, and I do not know if previous owners did any of that under work like steering stabilizers etc. If I am driving cross country that can ennerve me as I am a control freak. Any suggestions there? I will take it in for evaluation Thursday. Doug