Whats up maxima lovers.

i have an issue with my 01 maxima transmission. its a 5 speed. i recently replaced the clutch about 8 months ago. and now it started making this noise when its either in neutral or in gear as im accelerating. i thought it could be the clutch adjustment but my mechanic said that wasnt the issu, he mentioned something regrding an issue with the inner bearing of the tail of the transmission. the noise the ca is making sounds kind of as if its grinding on somthing. the noise foes away when the clutche is engauged. the car does still run perfectly and shifts as it should. its just the noise that concerns me.

if anyone can give me there opinion on what they think it could be. i would really appreciate it.