Originally Posted by ValleyRacer
If you have concerns about engine break in and attendant metal particles - just change the oil filter. For the pittance of an oil filter, change it once or twice. Consider putting in a magnetic oil drain plug. What can it hurt? It's your engine. Maybe even put on a high quality filter for particle capture. What can it possibly hurt? Or even a magnetic oil filter strap.
Just keep in mind, modern engine assembly plants have the whole mettalurgical part casting and CNC, lathe and machining, balancing & quality control issues fully in hand. Extensive concern over engine break-in is not really a topic anymore.
Did you READ the question? no where did he ask about the ENGINE, he asked about the AXLES!
OP, the manual doesn't say to change it but it does say no towing for the first 500 miles. changing it won't hurt anything, and putting a good synthetic in there might get you a little better gas mileage.