i dont want to sound cynical but good luck getting it resolved!! I've had the same problem for over a year, its been into the dealership over 15 times under warranty, they've rebuilt the rear diff 3 times replaced the front and rear diffs, transfer case, front drive shafts and a hundred other things. The noise is still there, everyone agrees it shouldnt be but no one can fix it. Isuzu are flying out a manager and their best service tech next week to test drive it and try and figure it out.

I think the cost so far from my dealer is in excess of $12,000 and its worse than when they started!

I sincerely hope you have more luck than me but hey, i have a entirely new drive train at no cost!!

Pete