Audi a6 2017 2.0 tdi quattro avant gearbox/drivetrain clunk

[Scream]

Hello.

I got a 2017 avant 2.0tdi quattro with 7 speed automatic transmission.

Last year I got a clunking sound sometimes when I accelerated and downshifting and the gearbox was jerky on lower gears. I got a new gearbox under warranty in desember, and I change a motourmount i february. The clunking sound got better, but i its still there. It was not that noticeable in the winter when the weather was cold, but now I can hear it since the air temp is higer..

The strange thing I found out is when im parked on a flat spot and put it in N, I get this clunk sound from under my car when I hit the brake pedal. This is when the gearbox is warm.. I doesnt get that sound when Im starting my car in the morning when its cold.

My local shop said the sound comes from the gearbox or the middle diffrential, and when I hit the brake pedal, the proppellershaft is moving..

I'm waiting to get my car into the Audi dealer that changed the gearbox.

HAve anybody elese experienced this? Could it be a fault in the gearbox, og maybe the proppeller shaft?

Sorry for my bad "norwegian" english. :O

Regards Morten

[Crasher]

Your English is excellent, better than many native speakers on here! Could you post the cars VIN so I can identify the unit fitted?

[Scream]

Thanks..

My vin number is: WAUZZZ4G0HN006997

[Crasher]

There are no TPI notices for this and no part number changes for the prop shaft, it is the spline version and these can get damaged during gearbox replacement. These props cannot be rebuilt according to Audi.

[Scream]

The car is going to the Audi dealer 20th of may. Hope the find something. Something is wrong, thats for sure. :P

Is this normal sound from the proppeller shaft? (not mine video, but same sound)

Audi A6 driveshaft noise / shudder - YouTube

[Scream]

I still have some clunking sounds from the new box when i'm pushing the brake pedal in neutral, and some clunking when i accelerate / deaccelerate.. I think it is the same sound, coming from the gearbox. The Audi dealer is talking about a second new gearbox :O .

[Crasher]

We have a customer with an A7 quattro where the box is failing, no exchange, just a new box for £10100 plus fitting.