swapping aw4

[1slowxj]

ive got a 88 xj with a 94 trans behind it the input shaft pushing is shot and is pouring out transmission fluid like crazy cant keep front pump seals in the thing ive got a few different options i can pick up a 97 trans with transfer case and convertor cheap i can also pick up a 99 with driveshafts and sye installed for same price so i would like too go that route reading into it seems that i would have to try to adapt output speed sensor? now i dont really care about speedometer seems how it was cable driven and doesnt work anyways but not sure if this is the one the trans control module uses to determine shift points and such and thats a little more important to me.. seems 97 swap would be cake not really sure what route to go and if there was simple way to make swap happen? any ideas?