Mark_O

Changed stock motor mounts for poly mounts (motor & transmission) and now at about 2,350rpm and 80mph my A4 car has a bad vibration; so bad my center console around the gear selector rattles. Below and above 2,350rpm and 80mph there are no problems.

The wheels/tires are aligned and balanced and are as smooth as silk so I believe this system is not the culprit. The suspension and chassis are all in working order with no failing or failed components.

Any thoughts?

Joshiedoom

iTrader: (4)

Get a stock tranny mount.

nitrousjunky

Yes get a stock tranny mount from a GM dealer. Most dealers usually stock them for about 70-80 bucks.

Joshiedoom

iTrader: (4)

That is a waste a money IMO when you can buy them anywhere for 7 bucks. the 1le mount is no more.

edwardzracing

iTrader: (59)

I had this same issue, and was completely stumped as to what was wrong. I didn't think installing poly mounts would create such a harsh ride, so I didn't even think about changing them. I assumed the tires were out of balance, so I had them rebalanced. That didn't fix it, so I assumed it might be the converter. So I did some reading, and rotated the convter one hole... nope, no fix. So I did a little more reading here on tech, and people said to try and change the poly trans mount back to a stocker. Surprise surprise it fixed the issue. Now all cars are not alike. A lot of people can run poly mounts without issue... I was not one of those people. Try a stocker and see if it's any better. Sorry for the long post, but although it may seem hard to believe, the poly trans mount probably is your problem. Good luck!

BAMALS1

iTrader: (16)

Mine has been giving me the same vibration...think I will change my tranny mount!