Transmission problem A8 / 4.2 / V8 / Bj. 99

Hello, everybody.

I've been kicking the A8 a little since some time since (which is very rare ), the following problem with the gearbox.
At first, when you switched from N to D with your engine running, you heard a kind of metallic, crackling sound as if metal plates were rubbing against each other. However, only in a position. In the warm running state the noise was then also gone in the stand again. At least at the beginning when the problem occurred. I assume it was related to the viscosity of the transmission oil.

==References== For two months, this sound passed to a dull hum, which is becoming increasingly heavy. Now you can also feel distinct vibrations. The colder it gets, the worse the noise / vibration gets. Now it is clearly audible even in the warm running state.

What I noticed when I put the Audi in position P at a slant with the front direction uphill when the engine is running is this noise. I put the car but with the rear direction uphill the noise is gone.

Gear oil.- + screen change I already had made, but without success. A reading also did not produce any results.

In driving mode, the gearbox works perfectly. No noises, no unusual gear changes, ....
Even in reverse there are no noises.

Can someone tell me what that could be and what it might be? must be exchanged ?


Welcome
Kevin