Do a search under tow mirror, or tow mirror swap, something like that, there should be a ton of threads about the procedure, maybe even some pictures so you can see what the insides look like and maybe even take yours apart. I remember something about a big spring in the pivot, so if yours is just freely moving I would think it has something to do with that. I installed the newer tow mirrors like yours about 3 years ago, I never did the manual to auto mirror swap but I did flip the glass in the tow mirrors, meaning my convexes are in the lower corners instead of the upper corners, I just prefered them in that position.