Looking for advice on what the clutch/transmission issue is on my 1994 F-250 7.3. I’m encountering a new loud “hissing” noise with when clutch pedal is not depressed. Same sound also occurs in gear, while driving and clutch pedal not depressed. Sound does not seem to change with rpm’s. Sound stops when clutch pedal is pressed. Video was made with truck parked, in neutral, at idle while I pressed/released clutch pedal a few times.

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