Yes there are many t-case optoins for your gen 2.5 and don't swap in a dana 44 into the rear of your truck
that would be a total waste of energy, time and money. Not to mention you would be downgrading your rear end. The mitsu 9 inch is stronger than a dana 44 and if you're not happy with that you can get a full floater kit for it, or swap in the mitsu 9.5 inch its way stronger than a dana 44, bolts on, comes with a locker "in most cases" and costs less than swapping in a dana 44. What axle do you have right now, the 9 or 9.5?

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped