[Old Guy with 87 GT]

ok.....this is the same noise i hear from mine and i've heard it on many other mustangs ......same exact noise and symptoms

....not a big problem .......on mine i put a new throw out bearing and an adjustable quatrant in it ........heard this squeeking noise after putting a few miles on it.......at first i was concerned......now that i have over twenty thousand miles on it with no problems ......no concearn any more ..........since then i've heard a few other stangs with the same exact symptoms and never seen it caus a problem

the culprit....the throw out bearing ......the cause .....if your clutch is adjusted so that there is no tension on the cable when the clutch is disengaged (the way it supposed to be) what happens is the throw out bearing slows down or stops turning but is still next to the forks on the pressure plate .......the noise comes when the forks on the pressure plate are baerly rubbing against the throw out bearing ....not enought to keep it turning but just enough to rub it and make an irritating noise

easy cure .....go to the hardware store, get a cheap low tension spring (a screen door spring works).......install it on the linkage at the transmission so it puts a small amount of tension on the clutch lever pulling it just a scoosh away from the clutch ........if its a low tension spring it won't make the clutch harder to engage but it'll keep the throw out bearing from touching the forks on the pressure plate

or if your lazy like me .....just turn the radio up