99 Concorde problems

I had this concorde for a while now, it has 52000 miles on it, i have been having alot of problems with it since i got it, but i just cant seem to sell it casue i love the way it looks and drives on the highway, the problems that im having is my trans whines when its cold, is that normal or not, and the car shakes when is standing in drive.

What engine? The 3.5 is butter smooth when running right. This engine blows the manifold gaskets often, runs rough, especially at idle.