OK, i've posted about this before diff whines between 55 and 70 mph. Over the last 6 months its been back to the dealership 9 times, they've rebuilt the rear diff 3 times, the last time installing a whole new final drive assembley, they've replaced the transfer case, they've done a host of other things too including removing the front drive shafts and that was the only time the noise went away.

Isuzu rep has driven the car, isuzu engineers have been directing the attempts to repair, they now have 4 engineers trying to come up with what to do next.

The dealership have been very good, providing me with a loaner car when i've needed it, does anyone have any suggestions because i dont think Isuzu or the dealer know what to do next?

I guess new front diff or transmission?

Its an 01 with 53000 miles on it now, it had 46000 on when they started working on the problem.

Any suggestions greatly appreciated.

Pete