My clutch pedal has an annoying vibration noise at certain RPM or speeds. It goes away if I hold my foot against the side of the pedal (but who wants to do that!) I converted from an automatic to a manual trans. When I got my pedals I got the shaft (long bolt), the pedals and the old pedal bushings which I replaced. Is there supposed to be a rubber bushing or something between the clutch pedal and the bracket that holds the pedals under the dash? I would think that could possibly eliminate the vibration noise. I've tried tightening the nut on the end of the pedal shaft but I don't think I should tighten it further.