It makes the noise in neutral and primarily when the engine is under vacuum. I don't need to worry much if it is a throwout bearing since my clutch will be replaced pretty soon. It was just replaced about a year ago, so I don't know how the throwout bearing would be bad already. I was hoping it wasn't the signs of a spun bearing or something because I need to drive it to work and school everyday and I can't afford an engine rebuild right now.