Replacing Center Mount
 

I was getting a vibration in any gear at about 30 mph, when cruising. Last I had the X on the lift, the Center Mount had more play in it then I have seen on other vehicles. I am thinking of replacing it. Anyone have to replace theirs? Did they get a vibration before it was replaced?

Thanks

http://www.realoem.com/bmw/diagrams/u/a/193.png
Center Mount is 8 in the diagram above.

check for bent wheels, check wheel balance, check tension strut bushings. place the vehicle in neutral at 30, and see if the vibration goes away, if it does, then it could be the transfercase/transmission/driveshaft.