I got a vibration coming from my undercarriage at about 15 mph it starts and smoothes out at about 25-30mph. I had removed the shaft because I replaced the output shaft seal due to a leak. Put it back on then the vibration started. My mechanic showed me the worn carrier bearing bushing so I ordered it from Blaufernugen. At the same time I had all four struts replaced. Ive dumped a bunch of cash and now I can not even drive it. I talked to a foreign car specialist mechanic that I have sucessfully visited for service and he of course had to look at it, but told me that it might have a sequence of some sort. I am considering buying the service manual but am out of cash already. We did put the spacers that the bearing had on it so I am stumped. Can youall help. Please

 

I also have the same problem, however mine is at like 17 mph and its only for a couple seconds, i cant seem to figure out what it is, i know it started after i replaced the clutch....some one help please

 

bump, for some help

 

So my A4 is still out of commision from this same problem. The car is at a import car specialist now that I have had good success with before. I called him today after he has had my A4 for about two weeks now and he told me they have checked it out but it is a very rare problem. He said he checked the balance of the shaft and it is good. I replaced the center carrier bearing with a unit from BLaufernugen and still the same. I saw a driveshaft rebuild kit on Blaufernugen and saw some sort ov CV bearings that go on the revieving driveshaft flange on both the front and back where it mates with the transmission and rear differential. Sorta like yokes on a Chevy, but I call them flanges. I think this is where my problem is eliminating and replacing everything else but those bearing I saw on the BLauparts rebuild shaft kit.