Throwout Bearing Blues

[Rstng93]

Hey guys i have been having a problem with the throwout bearing on my 89 Mustang 5.0. Every time I install a new bearing, it is quiet for a few hours and then starts making a squealing noise. This noise occurs when the car is in gear, or in neutral, and the clutch is released. The second I put a little bit of pressure on the clutch, the noise stops. I have replaced the bearing four times, and i have replaced every other part in there. I have a new pilot bearing, new: flywheel, clutch, pressure plate, fork, pivot, 4 throwout bearings, and i even put in a new rebuilt transmittion in yesterday. The noise persists. And today i noticed that it is making a rattling noise too. I am so frustrated over this problem. If any of you guys have had this problem before, or know what could be causing this problem, i would really appreciate your help. Thanks.