okay, I have an 87' comanche 4.0 with an AX5 tranny and an np231 transfer case. I am getting a new np231 from a friend for $100 and he says he'll give me the tranny for $200 more which I believe is an AX15. my question is: how much better of a transmission is the AX15 over the AX5? my AX5 seems to be in good shape other then the slave cylinder (the reason it is out), so would it be worth it to try and do a tranny swap assuming it is an AX15 with a 21 spline output shaft? thanks in advance