so as of now I've got a 90 yj with a 2.5 and it leaks some oil. It leaks from the rear main seal and various other places. Also the weak ax5 is slowly dying, the syncros are goin and Ive been driving and just living with it. What i was wanting to do was swap in the 4.0 and the ax15. I been trying to read as much as possible about this swap online, and it seems there is alot of info on this subject. I would have to change the input shaft on the np231 or use the 4.0 tcase, new motor mounts, wiring harness either used or new?, will the accessories off the 2.5 work like alternator, starter, radiator etc.. or will i need to try to get this with the motor?, also exhaust. What I'm running now is 33's and stock axles and 5 inches of lift. Has anybody around here done this swap or have any suggestions or can give me some more info.
Thanks, Alex