I cracked the housing on my driver side mirror backing into a parking deck pole. The motor in the mirror still worked, but it hung a little loose and would whistle at higher speeds, driving me crazy. This week I ordered the generic replacement from Amazon and installed it last night. (The glass in it is a little distorted, but I can live with that.) But now the new mirror is whistling too, at speeds over 40 mph. :x I know it's the mirror because if I fold it in while driving, the whistle stops. Anyone have suggestions for a fix?