I use magnetic drain plugs in everything that has a drain plug.
The amount of metallic fuzz you get on one can be very helpful in early diagnosis and evaluation.
Put the most powerful magnetic drain plug you can find in there. Don't be too alarmed at what you see the first time you change the oil. It can be worrisome.
But if it continues to shed metal at a high rate, then you are wearing down something. Usually cam and lifter issues in the car engines I am used to wrenching on, but in our case gears as well. It is much better to address this on your own timetable rather than the gremlin's schedule.