My clutch pedal recently started rattling when the clutch is engaged. When the car is in neutral it doesn't rattle. Is the throwout bearing going bad? It does squeak some. Car has 50k on it and it's the stock clutch.
Sounds like your tob or tob retainer sleeve, you should replace the clutch, tob, tob retainer sleeve(preferably a Mcloud or Lethal Performance peice) and of course resurface the flywheel since yours has never been done.