Vibration!! what is causes it?

[goinginzane]

I have an audi 90 Q and recently i have a vibration which begins at a speed of 90 km.

I dont really feal the vibration in the steer but more through the chair. So im thinking it comes somewhere from the rear. I have 1 tyre with less rubber on it then the other. Can this cause it? What other thing can i check to see if that is the problem?

Wheels where balanced half a year ago.

Emiel

[s2_bo]

are all the wheel bolts tight?

[stiglet]

Been offroading? Got a chunk of dirt on the inside of the wheel? Weight fallen off?

If it's not through the steering likely it's one of the back wheels.

[goinginzane]

the rear wheels havent really been off but i will check the bolts.

I also will look closely to the rear wheels ones more for dirt or missing balance led.

But there is litle chance that it comes from my drivetrain or diff??