Reverse whine f10 530d auto

[Fezz11]

Guys do you guys get a whine when reversing? (Like manual boxes)

Is this the straight cut helical thing the way gears are cut?

Just checking if normal

Thanks

[bmwmike]

Yup considered it normal tbh but guess it depends how loud yours is.

I also get a siren noise in DS mode when accelerating hard. I'm inclined to believe that's acceptable too based on what I've read of replacement boxes or brand new cars doing same thing.