okay loud sound, increases proportionally to speed, NOT the exhaust, my guess is its the differential. It goes away inder hard cornering. differential or rear wheel bearings? would a diff rebuild get rid of this?

 

Have you checked the wheel bearings yet or changed out the diff fluid? You keep asking the same questions but dont seem to be working toward fixing it.

Download the FSM or buy the haynes manual to check these, its not that hard.