[CSI]

After about 10 min. of driving I start hearing a loud intermittent squealing noise. It sounds like its originating from the bellhousing area. I thought it was the clutch so I replaced everything even the IMS bearing. Still after the car warms up the noise is back. Noise comes on at around 2k RPM. I can step on the clutch or gas and it will go away. I'm starting to think it might be the mainshaft bearings in the trans. Will the air oil separator make this type of noise? When I first heard the noise I thought someone was cutting wood with a table saw. Any help is appreciated.