Still have rediculous differential whine from 60 mph and up. Had the local rep ride in it and he says he owns one and it is normal. Personally I don't buy it, I will be going to the Ocala meet and will ask to ride in others, and have them ride in mine. If they have it I will shut up and try dynamat to quiet the cabin. If they don't I am going to be asking for help with signatures for my petition to Isuzu. Appreciate any further comments and help.