How does sending the power to the rear cause issues with the rear differential? Even if 100% of the power was sent to the rear diff, the tires on that axle were the same size, so it should have been business as normal as far as the diff is concerned right?

I've had some of the dealers and other techs say something along the lines of every single one of these posts, but none of them have ever seen this before that they can remember. One shop said they have people call in with a similar question from time to time, but never saw the car.