Howdy. My beater is dying. When I turn the AC on and engage the transmission, I get a wicked hyena-squeal that causes motorists within a 1-block radius to stare me down. It's humorous, but embarrassing. The squeal only happens when 1) the AC is on and 2) I don't have the clutch pressed and the car is in gear. I can't really self-diagnose as it doesn't do it while idling. At all. It goes on indefinitely, until I press the clutch in or turn off the AC.