Whining from front of '99 2wd xj while driving?
 

Noise happens above 40-50 mph, its a light pitched whining, Doesn't happen at idle and is not noticeable during city driving. Read posts about being differential or t-case or whatnot but this is a 2wd. Sounds prettly clearly like its coming from the front of the car, so I wouldn't think it would be rear diff.

Any ideas?

Thanks!