Vibration/ Rattle!

[lobo]

Ok...I've come across an annoying vibration.

It occurs above 65mph and sounds like it might be influenced by wind direction. I've found that it can be worse going the same speed but in a different direction on the road.

I'm unsure of the location - at first I beleived it was coming from the dash (maybe a bass/speaker issue) but soon discoved that it occured with the radio off.

I've tried pressing down on the dash while traveling above 65 when the vibration can be heard and this does not change the noise level.

I also checked to see if it was the black hood vent, as well as the hardware piece that houses the washer fluid sprayers - neither of these seemed to be the cause.

There doesn't seen to be much else except the felt liner in the engine compartment that may be the cause (I rather doubt it's the liner).

Has anyone experienced this vibration (it can be rather loud)? Any suggestions? I'd rather not have to take it in so soon to get it pulled apart for the diagnosis.