nglitz is right on target here. Diagnose BEFORE you replace parts. It is very easy to diagnose these items using the four P's; push, pull, pry and prod. If something is loose, figure out what and replace it.

Replacing parts on a trial and error basis is an expensive and frustrating road to follow. You can go to a tech and have it diagnosed and save money because of the lack of unnecessarily replaced parts.

Good luck,