Many clutch noises come from bushings and bearings.Pilot bushing noises are squealing, howling, or trumpeting sounds that are most noticeable in cold weather.These bushing noises usually occur when the pedal is being depressed and the transmission is in neutral.Release bearing noise is a whirring, grating, or grinding sound that occurs when the clutch pedal is depressed and stops when the pedal is fully released.It is most noticeable when the transmission is in neutral, but is also can be heard when the transmission is in gear.