Faulty 14-140mm lens?

[Fly-Catchers]

I am in two minds as to whether to keep my 14-140mm kit lens or not. Apart from the video judder I have been getting, I have also been getting this "whistle noise". This starts after a while- prior to that the lens is fairly quiet. But once the camera has been switched on about 10 minutes or so this sound starts up whether you are recording or not. I obviously don't want to sell the lens if it should be faulty. If I do get the lens repaired I would need to send the GH2 body in as well- which I am not too keen on doing as that seems fine with my other non- electrical lens.

Here is a short video of the noise. First bit with OIS off, second bit with it on. No difference in sound. The sound can be heard over the normal hiss of the built in mic. Faulty or not?

[media]http://www.youtube.com/watch?v=kdJeWoLOJWU&feature=player_detailpage[/media]