Can be a throw out bearing in the clutch assembly going bad.
A throwout bearing can make a whistling sound- really more of a chirp than a whistle. Unfortunately, it sounds like you are in for a new clutch assy.
With just that to go on I would say that your clutch release bearing is going bad especially if the noise quits when you put pressure on the clutch
you might have a air in your clutch system or your clutch master/or slave could be worn.
Throw-out bearing................
A 2002 Wrangler has a non adjustable hydraulic clutch.
How to change a clutch and master cylinder on a 93 jeep wrangler
you cant it is a hydrolic clutch
The clutch is not adjustable.
How do you replace the clutch slave cylinder on a 1989 jeep wrangler
the same as any other clutch.
No.
No.