I took the back cover off of the rear end and inspected the gears and they appear good, replaced the rear end fluid with new synthetic gear oil with recommended weight in owners manual. The noise is still there but at least I feel better about the rear end. I will continue to search for the problem and keep you informed.
The noise definitely has a relation to the engine speed and mostly occurs while accelerating but now I can hear it while slowing down sometimes.
Sunday, October 10th, 2010 AT 8:45 AM