Had this strange issue that I can't seem to trace down. When accelerating I'm getting what I'll describe as a whistling/whining noise when accelerating that can be noticed mostly between 2-3k RPM's once the car is up to about 35 MPH. It's a bit difficult to describe so I'm attaching a video along with this post. I believe it may be originating from the transmission, but it's very difficult to pinpoint as the sound only occurs while driving. In this clip the sound begins at appox. 8 seconds. Any suggestions are much appreciated!
https://youtu.be/utbFK5i_nao