Front wheel bearings' signs of going south??

[Albert Ng <alng@expert.cc.purdue.edu>]

Hi All,

Soon after showing off my 5kcst's new found braking power to my
brother during the weekend, the front end of my Audi developed a very loud
'wo wo wo wo' noise whenever it reachs 45mph or higher. Btw, the noise's
tone will changed to a higher and louder wo wo wo wo as the speed 
increased to 80mph.

I think the noise has already existed for sometime already, it just wasn't
as loud back then.

So, I did a lot of tests this afteroon.... including switched tires to
different conner and performed the wheel bearing test. However, the noise
is still there regardless how I switch the tires around(I even put my snow
tires on it). And, I found no play for both front wheels during the wheel
bearing test. 

My question: Can the wheel bearing be failed even I found no play during
the wheel bearing test? 

Or just something else that causes the noise??  Flat-spot-uneven wear
tires? How about the worn out a-arm bushings? I noticed the a-arm bushings
on my Audi are in really bad shape. Please help me guys.....         



TIA

Albert Ng
'87 5kcst