Originally Posted by srh
Thanks for your reply! It is the arm that attaches to the body that is loose. Is that what you understood to be?
There are three main pieces to the mirror. The mount to the body, the arm and the mirror.
If the arm is loose you have to pop off a little chrome cap on the bottom of the arm mount to the body then tighten the nut! It is either 1/2 or 9/16 if my memory is correct.
Make sure this is the problem. I really can't see the arm coming loose once it is tighten. They are real hard to get out, that I can tell you for sure. I had to us a rubber mallet and smack the heck out of it to get it loose so I could remove the chrome cover over the mount to tighten the mount bolts.
I would try to move the mirror mount by hand to make sure it isn't loose too.