If you do not replace it [as well as clutch and pressure plate] it may cause excessive wear on the pressure plate and the shift fork.
It wouldn't do it any good.
A bad throw out bearing will make noise when the clutch pedal is pushed down.
Does a bad thow out bearing sound like a bearing
Bad or improperly installed throw out bearing? broken throw out bearing fork? hydraulic? bad slave cylinder?
Tire out of balance, broken belt in tire, bent wheel, suspension wear, or possible bad wheel bearing.
It is probably the throw out bearing going bad. You have to remove the transmission from the bottom to replace it. Replace the clutch, pilot bearing, and throw out bearing and have the flywheel resurfaced.
It will squeal when you are not using the clutch
No, main bearing noise is a rumble Throw out/release bearing for the clutch will only be heard when the clutch pedal is depressed. If you hear the noise without the clutch pedal being depressed, it is most likely the gearbox first motion shaft bearing that is at fault. First motion shaft bearing noise usually goes away when the clutch pedal is pressed.
Clutch throw out bearing bad.
Bad enough that the oil pan will have to be removed and the rod bearing replaced if that is all the damage that has been done. You will also need to find out why this happened.
bad throw out bearing
The clutch bearing or " throw out" bearing is going bad and will need to be replaced, take this opportunity to change the clutch as well.