Okay, so I have noticed a sort of grinding noise and vibration when the car is sitting a stop light. At first I suspected power steering fluid was low but that did not fix it. I have noticed it only does it in gear. When it is in park, it will not make the grinding. It goes away when I accelerate. I have been told it might be my supercharger bearings. I am checking on here to see everyone's input and if there is an easy way to tell what it is and fix it. I'd appreciate any help. Thanks.