Another update... Took the SS out on Friday and the sound disappeared, drove it again Saturday and the noise was worse than ever. WTH is going on? Is it possible that it's just the belt that is causing this noise to come and go?
Quite possible it’s the belt. My wife’s SS kept making a terrible sound under power. Cleaned the belt and sound went away for one day. Came back worse. After the fourth time I cleaned it the sound seems to have gone away. Frustrating!