Hello folks, I have a question about our superchargers. Over the weekend I was cleaning the engine bay and was cleaning the black pulley behind the clutch for the supercharger, and noticed that when I would spin it back and forth there is a small clunking noise every time you spin it back and forth coming from the inside, no side to side play or back and forth play in the shaft or pulleys, just the noise from back and forth spining, also does not sound like any grinding noise, it feels like a worn out key way on a shaft. Has any one else found this problem? if it is a problem in fact or is this normall ? Just want to find out before the blower goes out. Thanks in advance, Kevin