98coupe - did a car fax - no issues. The mechanic (not my regular one) who checked it out said it was just the tires were old and out of balance, in regards to the vibration. We thought new tires/alignment would fix the problem. It did not.

The vibration that occurs when I brake using the e-brake, is not the same vibration I get with accelerating. I included this information in hopes that it would add more clues.

Fstop - I don't have any hum at all -- I have had to replace two wheel bearings in other cars - and recognize the humming noise. Very distinctive.

Thanks