I have a friend who have a huffy cruiser with a coaster brake than sound like it coming apart, the brake does work, but when the wheel is spinning is when the sound is heard . I have open up the hub and overhaul the system 2x and for the life of me I can not find anything wrong with it. I been twenty years in this business and have never see or hear this before without fixing it. It is a falcon hub ( do I said more ) , it is similar to a shimano unit. any ideas people ?