At least I was able to get the fill bolt out to top fluid up, seemed pretty empty as I got over 2 quarts in. At the same time I have no idea what fluid was in there. Cross my fingers it's ATF which is recommended.
Cracking the case is a much worse situation as the tcase is working fine. Drilling it out maybe the best option, plug is in there so tight I risk stripping threads on the tcase.
I have a feeling for the drain bolt to be flush against it was over torqued? My fill plug wasn't.