Its not the same transmission and will require more work to swap it in but it can be done.
It is an upgrade though, but you'll need to swap t-cases as well among some other stuff. Look up AX-15 swap for 2.5L or something along those lines, should be some info out there.
[B]03 Rubicon[/B] (Weekend Toy) [URL="http://www.jeepforum.com/forum/f176/marshals-03-rubi-2822258/"]Build thread[/URL]
[B]11 Ram 2500 [/B] - H&S tuned 6.7 Cummins (DD/Tow Rig)
[B]05 Liberty Limited[/B] (Wife's): Minor mods, OME/JBA Suspension, 245 70/17 Duratracs