[olrocker]

I was surprised that the owners manual would suggest even for normal driving the rear diff service doesn’t need to be done for the first 45k miles. These aren’t your basic, old fashioned 10 bolt 7 1/2” open diffs that could probably go infinitely without a single fluid change. They generated little heat and the machining tolerances were probably “good enough to work”. This is some high tech (ie expensive) stuff, precise machining tolerances and can get warm if you like to have fun. Doesn’t hurt to change the fluid within the first 10k miles.