Well dealer replaced both rear wheel bearings, while the rear end is quieter, I still have this high pitched whine at 60 mph and above when applying accelerator, when I lift off the pedal it goes away. Just to see if this is normal I went to another dealer who had a 2000 for sale, and it did not have this noise and was much quieter. Any suggestions? The dealer said bring it back and he would call Isuzu again, need help.