Growl from DCT in neutral?

[Helmsman]

Well with the RB's and TA's in place it's time to start worry over something else...

Had the car for a long time and never noticed it before, may simply be because I haven't listened closely enough (with fan shut off).

Obviously there is the healthy clunk/growl that should be there when going between D-N-R, but when trying N at idle there is a slight growling noise, like something would be lose. And maybe it's just that, un engaged clutches etc that should be allowed to make some noise.

Had the DCT over heat code coming up a couple of times lately which is the reason I was listening a bit more. Seem all fine though.

Anyone else experienced mentioned noise in Neutral?

Thanks