Got a tensioner replaced. So far so good. Thanks everyone

They say it is a tensioner. It is back ordered and to be replaced next week. I will let you know the results. Thanks.

The noise is definitely coming from pulleys/belt location. Once I have time I will visit the dealership to get this looked into. Thanks

I will try to take this shifter cover off tomorrow. There should be some relays underneath it.Thanks

You are right. it is NOT the gas. The noise is still there but became a bit quieter.It doesn't actually seem to speed up when RPMs go up in P or N.It looks like transmission or pump relatedI will dig deeperThanks

I will definitely try to locate the source of this noise next time I hear it.I think it can have something to do with winter gas quality. As I am analyzing it now I seemed to have that noise between two fill ups. Coincidentally I got the lowest mpg ever on that tank of gas. Not sure if water or some...

I couldn't hear it outside under the hoodThis noise appeared to be coming from under the dashboard inside the car. I couldn't locate the exact place of it though. It seemed to be close to the gear shifter.This noise was audible in N, P and D. It was quieter at idle and more pronounced with higher re...

Mine is 2.4 auto FWDI think it is speeds up a bit when the revs go upI can not check it now as it is gone. As Vibeguy2 mentioned before it is on and offFrom other threads a similar sound was made by a faulty pump resistor on RAV 4Any ideas?Thanks

I have got exactly the same thing and the same mileage on my car. Did you happen to figure out what it is? Thanks