Noise coming from under gear shifter. Sounds like a hissing or egg sizzling. on 2001 Ford Ranger

The issue began after a clutch was replaced. Both master and slave cylinders have been replaced which did not make the issue any worse. It seems to be more frequent when in gear rather that idling My thoughts are the Synchronizer(s) are going out. I do not hear it in 4th or 5th maybe because of road noise. Thank You.

Asked by for the 2001 Ford Ranger