No subject

-stuck brake calipers/pads 
-center driveshaft bearing(Hackl and I did this on his car a while back and when bad it makes a good howl inside the car) 
-check the tranny fluid also rear diff fluid 
-I also like the idea of heatshield rubbing on axle or drive shaft, check for that. 

Good luck with the search. 
- 
Dave 

> Thanks guys for the ideas......I've had the exhaust riding on the rear 
> axle before, and this is not it. Seems like it is coming from the front 
> of the car.....sometimes it seems like the right side, then sometimes the 
> left......sometimes it will change "pitch" while still going the same 
> speed.....sometimes I can hear it all the way down to a stop, but it will 
> never start until about 20mph. Turned off the car while still rolling 
> about 20mph and the howl was still there. Still have not been able to 
> hear it outside the car personally, but not known if it actually makes a 
> detectible noise from outside the car. I've messed with the HVAC 
> controls, etc. to no avail. 
> 
> Made another visual inspection all around and didn't see anything amiss 
> once again. 
> 
> I'm stumped...... 
> 
> Jim Fleischer 
> '83 ur 
> '95 s6 avant