If you are worried about strength, have Bobby Long cryo the front ring & pinion. I don't know the specifics, but I have read that it doesn't help in the rear differential.
![I Dunno... :dunno:](https://board.marlincrawler.com/Smileys/marlin/dunno.gif)
I think the Cryo is recommended for trail rigs only, not DD. I don't know many of the specifics either.