NHA842

Hello, I'm trying to diagnose a pulsation in my 2007 A8 SWB with 140K which occurs when there is no throttle being applied at 35mph to highway speeds. Also, at slow speeds I'm hearing a clicking sound in the front end. I know this is vague information but i"m hoping someone out there may have experienced something similar. Front upper control arms and alignment were done a thousand miles ago. What are the symptoms of a failing driveshaft? Thanks for your time.

NHA842

Also, the pulsation is not felt in the steering wheel but rather the seat. The clicking at low speed is heard and not felt. Thanks

AudiDad15

Have you checked your air ride compressor? When mine is being over worked (at it kicks in around 35mph and works harder the faster I go. I can feel it in the seat as well. If you have a vcds, you can perform a level calibration and that seemed to help my compressor and car run much better at higher speeds. Just a thought.