INjake89mj Posted April 16, 2015 Share Posted April 16, 2015 OK, I have a 1989 Comanche that has full late model swap. After selling my 96 Cherokee with a 5 speed, i really miss shifting gears. I just recently purchased an AX-15, NP231, pedals, cross member, and drive shafts from a 1992 Comanche. It is internal slave, so I found and purchased all the necessary parts to convert to external slave. The only thing I need is the shifter bezel for the 97+ console, which i believe is still available from the dealer. Now to the question. The transfer case that came on the AX-15 has a much different speed sensor than my 1998 transfer case, and from what i can tell, my transfer case will not bolt up to the earlier AX-15. So whats my best solution? Could I pull the input shaft out of the earlier t-case and use in my late model t-case? I searched on this for a while but I'm sure the information is out their, I just can't seam to find an answer. Maybe i'm just over thinking it? thanks! also - the jeep that I pulled these parts from was a 1992 Long bed, obviously 5 speed, 4x4, 4.0 with a Dana 44. It was Dark Green. I did not get the VIN...I have tried to get it but no luck, It is 2 hrs away from me. Was being parted out after a roll over. I've heard that the green Comanches are rare but with this combination? Will inform if i do receive the VIN. Link to comment Share on other sites More sharing options...
INjake89mj Posted April 16, 2015 Author Share Posted April 16, 2015 another question, I still don't have a flywheel, figured i would buy new with the clutch. Do i need to source a flywheel for tranny year or engine year? Pilot bearing? thanks! Link to comment Share on other sites More sharing options...
87MJTIM Posted April 16, 2015 Share Posted April 16, 2015 The tcase should bolt up to the AX15. The bolt pattern did not change for the years mentioned. The flywheel should be for the 89 since it is RENIX. All the other year's Jeeps are HO. Link to comment Share on other sites More sharing options...
Rockfrog Posted April 17, 2015 Share Posted April 17, 2015 The ax15 will mate to pretty near any jeep transfer case made from 1990-2006 (there are a few exceptions to this, but and 231/242 will). The speed sensor may look different, but the mounting pattern and drive specs are the same, they just changed what went in the hole over the years. In any event, yes, the input gears are swappable, although the ax15 has more than enough spare room to accept even the ZJ style long input gear. All ax15s used a 6 bolt transfer case output pattern, and a 23 spline ouput shaft, this was never changed. Link to comment Share on other sites More sharing options...
INjake89mj Posted April 17, 2015 Author Share Posted April 17, 2015 The tcase should bolt up to the AX15. The bolt pattern did not change for the years mentioned. The flywheel should be for the 89 since it is RENIX. All the other year's Jeeps are HO. yes, i know that they will bolt up, I'm concerned with splines matching up. I should have been more specific. And I have nothing on my jeep that has anything to do with Renix. The speed sensor on the 92 t-case has a nut that threads onto the t-case. My 98 t-case is just an electric plug. I guess i'm just going to use the 92 transmission and t-case since i know they are compatible to one another, and i'll just figure out my speed sensor issue later. Unless i think i need to rebuild the transfer case, then i'll just go ahead and swap out input shafts and be done with it. Going to post same topic on the Cherokee forum, since this is more XJ specific. Link to comment Share on other sites More sharing options...
87MJTIM Posted April 17, 2015 Share Posted April 17, 2015 All AX15s have 23 spine shafts. It was the BA10 that had 21 spines. A tcase that came off of a 89 1/2 MJ/XJ will fit all later model AX15s. (Jeep dropped the BA10 mid-year in 89.) MJs and pre-97 XJs are VIRTUALLY the same from the front seats forward. Link to comment Share on other sites More sharing options...
JeepsOLot Posted April 17, 2015 Share Posted April 17, 2015 I might be missing it, but, the drivetrain you have in the MJ now has an auto tranny, right? If so, I believe the splines are different on the input side, and you will have to swap input shafts. I can't remember the spline difference, thought. Jerry Link to comment Share on other sites More sharing options...
INjake89mj Posted April 17, 2015 Author Share Posted April 17, 2015 MJs and pre-97 XJs are VIRTUALLY the same from the front seats forward. i understand this, my jeep is a post 97. Thats what i'm having trouble with, their is very few post 97 jeeps with manual transmissions. Information seams to be scarce. Yes, my comanche is a 1998 for all intents and purposes. 4.0 4x4 aw4 Link to comment Share on other sites More sharing options...
gogmorgo Posted April 17, 2015 Share Posted April 17, 2015 The reason 87MJTIM said you'll need the Renix flywheel is because the crank position sensor reads off it. So you'll need the one that goes with the CPS you're running. If you've done an obd2 swap, you'll need an obd2 flywheel. Link to comment Share on other sites More sharing options...
NachoJeep Posted April 17, 2015 Share Posted April 17, 2015 your '98 transfer case will bolt to the 92 Ax-15, I did a late model conversion on my '92 with AX-15, I have a '98 231 bolted to the '92 AX-15 with no issues. other than I have not be able to locate a 5 speed boot for the '98 console yet. Link to comment Share on other sites More sharing options...
Jeepman Posted April 17, 2015 Share Posted April 17, 2015 The vehicle speed sensor otherwise known as the VSS just unbolts and is removable from the t-case so just swap the 92 VSS over to the 98 T-case and be done with it as I think your just over thinking this entire swap... Link to comment Share on other sites More sharing options...
Rockfrog Posted April 18, 2015 Share Posted April 18, 2015 He is, it's easy to get caught up in all the minor changes made over the years ... Until you realize they weren't really changes just updates. The VSS' used from 87-01 are fully compatible as far as drive mechanism and mounting method, swap the one you need. The manual transmissions used from 1989 1/2 to 2006 used the exact same 23 spline, 6 bolt pattern ... As did the automatics from 1990-2006. Only the 4cyl and earlier transmissions used a different pattern (the 2.8L gets lumped in with the 4cyl in my brain). Link to comment Share on other sites More sharing options...
INjake89mj Posted April 18, 2015 Author Share Posted April 18, 2015 I didn't think this hard when I decided to do the late model swap...I just took off and did it, but at the time it wasn't my only driver. I just want to make sure that when i decide to do this that everything is ready to go. It's my DD so when i decide to swap it on a Friday night, it needs to be driving on Monday morning. Thanks for all the reply's, thats why i turn to this forum for help, because i know i'm not the first of the last to be stuck on something. Link to comment Share on other sites More sharing options...
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