Large transmission leak, gasket set on national backorder dealer says.

I was .3q~ low on t-case, not low on transmission fluid. I did tell the dealer upon initial noticing of the leak to top off trans oil, but it was long enough ago(two weeks) that if it were a significant leak of trans oil it would have been much lower. Changed both...in hotel parking lot today. Went well. I was thinking it might only be leaking whilst in 4 wheel drive as i wasnt super low on fluid. Is this a plausible scenario?

I also want to take a moment to say thanks,, and each time something like this arises and you folks give me enough information and support to do things like I did today, I get confidence to take on larger jobs myself. And I really enjoy my 1st gen, and also not getting taken to the cleaners on stuff like this.

At this point im not certain but I believe the leak to be t-case oil.