Squeal?? I'm still
to understand how/what would cause the clutch to squeal, depending on hydraulic fluid. Are we talking about sqeaking hydraulics as the peddle is pressed in and out?? If not that and you're referring to some squeal from the clutch itself, e.g., the fluid is getting out of the slave and on the friction disc...maybe...but that would be another issue entirely.
Sorry to be so obtuse.
