2006 Volkswagen GTI Noise while rolling in 1st gear.

When in first gear and rolling (no pedals pushed) there is this whiny high pitched noise coming from the engine bay. If you push on the gas it goes away, if you push the clutch in it goes away. There is a slight noise when in second too, but much more noticeable in 1st.

The dealership doesn't know what's going on. They replaced the 1st gear to see if it would go away, but nothing changed. So now they're claiming it's normal. It only happened a few weeks ago so it's definitely not normal and it gets louder the longer you drive (i guess something heats up).