Just had my power mirror on the driver side replaced, but now it seems to vibrate, whereas when I look at my passenger side it is solid. Now not the whole mirror assembly is shaking, just the mirror part.... it's rather annoying, and it never did that before, thank you to the douche bag that hit my car, now my mirror vibrates when I'm driving down the road. Tried to tighten it up, but no good... any ideas?