I would suggest to replace the gear oil in both differentials. There are several threads here and on the Wrangler forum that show these Danas have quite a bit of wear-in metals show up on the magnet at low miles.
Also, good practice to check all of your fluid levels. I have had to top off the...
Very good points.
I'll just kindly add the quote of the ole adage to compliment your thoughts: "better to have it and not need it, than to need it and not have it."