It sounds like either an axle seal let loose or something in the differential. Is it possible to have the car put on a rack and lifted. Either leak will be easy to identify from under the car. I hate to ask you that, but it's the only way I can be sure. Also, it noise could be coming from a CV joint.
Let me know what you find or if you can safely lift the car at home and check. Either way I'll help direct you.
Joe
Thursday, December 18th, 2008 AT 9:04 PM