Car squeaks at idle

The TOB or "release bearing" is used to transfer axial force (the clutch pedal moving the clutch release arm) to the spinning diaphragm spring. It sits on the input shaft collar of the transmission, just behind the clutch cover & diaphragm spring:



When these bearings go they often make noise when the clutch pedal is depressed, when they are loaded, not released when there is little force on them. Noises typically range from a howl or whine to a rumble etc.

It's possible the release arm pivot is dry and the squeak you hear is that and not the TOB. A little bit of pressure on the pedal loads the fulcrum and stops the squeak. Does the car have an adjustable clutch cable or quadrant? If so, it may be adjusted a little tight which is loading the bearing against the diaphragm and the release arm is moving due to a bit of runout or something.

Getting to the pivot to lube it is tough as it's inside the bellhousing (passenger side).