At best a truck service center might be about the only dealer type service shop that might have a mechanic that would understand differentials. We have a big Ford dealer here and they have a huge commercial truck service shop and I know of several of their long time mechanics that could handle that.......they are also car guys with several performance muscle cars. Then if you head across the lot to the car service center I don't know if I would trust one of the mechanics over there to handle rotating the tires properly on the wife's minivan.

The only other places that I might trust to do the job or point me in the right direction are a couple of performance engine builder shops. They build race engines from drag racers to circle track racers and those guys are always working on differentials....the racers that is. The performance engine builders would know where to send you or maybe even do that service/build in house too ??

Mike