xjrev10 Posted April 27, 2011 Share Posted April 27, 2011 I just found a lower mile AX-15 out of a 98 TJ. What would I have to do to it to make it work in a 87 MJ with a pukey? Would my NP231 hanging on the pukey bolt up to 98 TJ AX-15? Clocking going to be a problem or easy fix? Looking for a education even tho its been pounded to death but I could not find a question like mine.. Also what would be a good clutch upgrade? This Jeep will be running at least 35s with a 4:1 in the 231.. Link to comment Share on other sites More sharing options...
Garvin Posted April 27, 2011 Share Posted April 27, 2011 I'm not sure on every single part but I can start off the list. You will need a new cross member (AX15 hangs down about an inch farther than all the other transmissions), new clutch and flywheel, new slave (believe the Wrangler AX-15 is external slave?), and most likely a new clutch line. Your transfer case will not fit as the BA-10/5 is a 21 spline output as all AX15's are 23 spline outputs. You will need an AX15 mated transfer case or '91 or newer mated transfer case. If you are going with the 4:1 kit, now might be a good time to get it and you can use your transfer case as it comes with new planetaries in the front with a 23 spline input. As for the clocking, I've heard a few mixed things. Some have gotten it to work without any issues while others have had to massage the floor a little to clear. At worst, you will need to tap a small portion of the floor up a little for clearances. Link to comment Share on other sites More sharing options...
xjrev10 Posted April 27, 2011 Author Share Posted April 27, 2011 I will probably fab my own X-member, forgot to ad that in the original post. Thank you for the very imformative post! I think I'm going to jump on that low mile AX-15 now! Suppose I will need a different bell housing too.. Source one from any MJ/XJ ax-15 equipped rig I suppose. Link to comment Share on other sites More sharing options...
Garvin Posted April 27, 2011 Share Posted April 27, 2011 Was kinda assuming that the bell housing was coming with it...Try finding one from a '94 or newer for the external slave. If all else fails, I have an internal slave one kicking around that you can have for shipping. I pulled it off the '92 AX15 I had to swap on (with an adapter) the Chevy bell housing for the Chevy 350 swap. Link to comment Share on other sites More sharing options...
Sir Sam Posted April 27, 2011 Share Posted April 27, 2011 Ya if it doesn't come with the bellhousing find a 94+ XJ and take the bellhousing and master/slave/line combo to convert to an external slave. Link to comment Share on other sites More sharing options...
xjrev10 Posted April 27, 2011 Author Share Posted April 27, 2011 Its out of a 98 TJ.. Trans was pulled and replaced on a wrong diagnosed drivetrain problem. The shop ate the bill for the new trans sounds like and they have had this one laying around. So I guess I'm just assuming that it doesnt have the bell housing. That shouldnt be too much of a problem. Link to comment Share on other sites More sharing options...
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