Originally Posted by SH0RTBUS

If your covers are not leaking, just change the fluid. There is no sense in looking for uneven wear or metal shaving. Your responsibility is to change the oil. The warranty is for the rest. If you notice metal shavings, excessive wear, etc, what are you going to do, change the gears yourself? Nope, you'd take it to the dealer under warranty, which is the same thing you would do if the differential failed completely. Again, I would just change the oil, satisfying the service requirements without the additional work.

Originally Posted by CIJeep

Well then at the least run a magnet in the hole and to the bottom. Getting rid of the shavings, particles will stop them turning into a rubbing compound effectively wiping out the bearings and or gears. (as well as potects the seals)