So early yesterday morning my NSX began to make some unusual noise. It is a chattering sound. When driving it the noise gets louder and when the clutch is pressed the noise turns into a grind. Almost sounds like the starter grinding when you try and start a car already started. The clutch was replaced with an exedy stage 3 clutch by the last owner. The clutch doesn't slip, but the release point is pretty high. Looked through FAQ and other owners post, but can't find the same match. I want to rule it as a throw out bearing or starter motor.