car feels like it's shaking at high speeds, any thoughts?
 

could the tire pressure being low on one tire do this?

any other thoughts would be helpful.

tia

could it be the wheel balance?

quit driving so fast foo......................:)

what suspension do you have....
 

when my car had the non-sport susp., it felt awful at speed on the highway. On windy days, the car would get blown all over the road, and when I'd drive by big trucks I'd need both hands on the wheel. All of this went away when I got new susp.

If it shakes around 70-80
 

I had the same problem on my wheels.... just make sure they are balanced properly.. and your fine

I would get your tires balanced. Mine runs smooth as silk at any speed.

I'd say tire pressure and/or balancing, I have no problems with mine at those speeds (sport susp.)

If it's around 75 mph, and you can feel it in the steering wheel, I'm guessing it's wheel balance.

could be. i just took all the wheels off to paint the calipers and i cleaned the inside could've
 

<center><img src="http://pictureposter.audiworld.com/21836/wheelba.jpg"></center><p>
thrown it out of balance

yep those dust actually designed by audi to help balance the wheels...:)