as part of my build i'm gonna be using the AX5/NP231/and driveshaft out of a 97' TJ in my 91' YJ. The motor is out of a 93'. On pre-94' YJ's you will need to convert to an external slave cylinder,
or you could convert the TJ trans to an internal slave, but thats a stupid idea.
to do this the way i did you will need your old YJ trans as a donor for parts
I scored the trans to the driveshaft for $200 of a guy on craigslist.
swap the mount brackets over
it's 4 bolts
an thats what your left with, next you'll need to put the mount from your YJ trans on it. Since im swapping an engine at the same time im doing all the bolting up on the ground and then just gonna shoe horn it all in
next, you will need to swap out the speedo gear housings, its a single blot that holds down a C-shaped clip, the clip fits into grooves on the housing, once you remove the single bolt the hole assembly can pull straight out. On the TJ there is electronic speedo gear, where the 91' had a cable. If you have an electronic speedometer cable then this step can be skipped.
removing from old ax5