JeepguyDon

I'm picking up a 96 190K miles 6 cylinder 4.0 unbelievably clean. Handles great it has alltime 4 wheel drive. I drove it about a mile and a half it has a slight tranny slip. I've heard that you can drain the tranny fluid change the filter and put back the old tranny fluid. Sometimes this solves the problem. If not I have access to tranny from a 2000 Sport also a 6 cylinder 4.0 but not all time 4 wheel drive will this tranny interchange. Thanks in advance JPD