PACIFIER Posted December 9, 2011 Share Posted December 9, 2011 I just picked up a 1989 short bed Comanche with a 4.0, 2wd, Pukegeod :ack: transmission. My questions to you gents are following: Does a 1996 XJ Transmission and Tcase just bolt on to the Comanche? Will I need a new wiring Harness What other foreseeable issues may I come across during this project (drive shafts, clearance, etc) The day I picked her up. Towing it with my Cherokee Most of the Body work has been completed.... Working on the engine now (only 129K miles on it) Link to comment Share on other sites More sharing options...
PACIFIER Posted December 9, 2011 Author Share Posted December 9, 2011 :huh???: Nobody knows? :dunno: Link to comment Share on other sites More sharing options...
Pete M Posted December 9, 2011 Share Posted December 9, 2011 patience my good man. contrary to appearances, we don't live in front of our computers. :D is the XJ an auto or a manual trans? Link to comment Share on other sites More sharing options...
mvusse Posted December 9, 2011 Share Posted December 9, 2011 I don't see any problems with swapping in a 96 manual transmission (AX15). The 96 transfer case uses an electronic speed sensor, though, while your speedometer needs a mechanical one. I know the 92 and 93 transfer cases they can be swapped, but don't know if it's that simple in a 94 or newer one as they changed some things inside the transfer case. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 10, 2011 Author Share Posted December 10, 2011 patience my good man. contrary to appearances, we don't live in front of our computers. :D is the XJ an auto or a manual trans? I'm an IT guy, so I'm always in front of a computer :hateputers: Anyway, the XJ is an automatic and my MJ is manual. Link to comment Share on other sites More sharing options...
mvusse Posted December 10, 2011 Share Posted December 10, 2011 That would be an AW4, and I'm fairly sure for 91 through 96 that the TCU is party of the ECU. You'd want an 87 through 90 one with a stand alone TCU. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 10, 2011 Author Share Posted December 10, 2011 That would be an AW4, and I'm fairly sure for 91 through 96 that the TCU is party of the ECU. You'd want an 87 through 90 one with a stand alone TCU. Good to know.... Sounds like I need to sale the parts I currently have and find me an 87 - 90 XJ. Thanks Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 10, 2011 Share Posted December 10, 2011 That would be an AW4, and I'm fairly sure for 91 through 96 that the TCU is party of the ECU. You'd want an 87 through 90 one with a stand alone TCU. 91-95 OBDI models all had separate stand-alone TCUs and will interchange throughout the OBDI years even though they have different part numbers. You can use the 96 AW4 in your 89 IF your existing wiring harness has the TCU connector wired-in to the existing harness. I'm not sure if it is. Look up under the lower dash, right side, and see if there is a 26-pin rectangular connector hanging there. Link to comment Share on other sites More sharing options...
mvusse Posted December 10, 2011 Share Posted December 10, 2011 Do the OBD I TCUs need vehicle speed input? If so, does the transmission have a separate output shaft speed sensor for this, or does it rely on the speedometer one? If it relies on the speedometer one, then how do you work around this, as his dash needs a mechanical one for the speedometer to work? [hijack] Out of curiosity (and for my own need, as i still need to get one to swap into Sparkles), am I correct, then, to assume for 96 it is part of the ECU? And more importantly, is the 91 through 95 AW4 transmissions fully compatible in a 96 XJ, or are there problems with missing sensors and/or different wiring harnesses. [/hijack] Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 10, 2011 Share Posted December 10, 2011 Do the OBD I TCUs need vehicle speed input? If so, does the transmission have a separate output shaft speed sensor for this, or does it rely on the speedometer one? If it relies on the speedometer one, then how do you work around this, as his dash needs a mechanical one for the speedometer to work? Don't think this is a problem. To lock/unlock the torque converter the OBDI AW4 TCU uses the signal from the electro-mechanical speed sensor in the tailshaft housing (2WD) or T-case adapter housing (4WD), same as the Renix AW4s, same part number even. Out of curiosity (and for my own need, as i still need to get one to swap into Sparkles), am I correct, then, to assume for 96 it is part of the ECU? And more importantly, is the 91 through 95 AW4 transmissions fully compatible in a 96 XJ, or are there problems with missing sensors and/or different wiring harnesses. Not sure about the 96 OBDII TCU/ECU integration. They do use the same tranny speed sensor as the older models however. IIRC, the control electronics in the AW4s are all the same; it doesn't care if signals to the four solenoids come from a separate TCU or from a TCU/ECU if the appropriate vehicle wiring harness is used. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 15, 2011 Author Share Posted December 15, 2011 Finally got a chance to pick up the XJ (96) parts from my buddies shop. I guess I can start by swapping the front axle until I figure out the tranny / tcase dilemma. :mad: Link to comment Share on other sites More sharing options...
FrankTheDog Posted December 15, 2011 Share Posted December 15, 2011 Careful on that frontend. It will have 3:55 gears if it's from the auto and your manual will have 3.07 gears. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 15, 2011 Author Share Posted December 15, 2011 Careful on that frontend. It will have 3.55 gears if it's from the auto and your manual will have 3.07 gears. Thanks.. I got that covered, picked up a set of 4.10 gears already. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 18, 2011 Author Share Posted December 18, 2011 :dunno: Link to comment Share on other sites More sharing options...
PACIFIER Posted December 25, 2011 Author Share Posted December 25, 2011 What will be a better option AX15 or NV3550? The easier the better with the least amount or additional parts / wiring mods. Link to comment Share on other sites More sharing options...
Geonovast Posted December 25, 2011 Share Posted December 25, 2011 AX-15 and NV3550 will be the same amount of work. The only electronics for them are the CPS (which depends on what year wiring you have), and the reverse light switch, which worse case will require splicing wires. I believe the NV3550 is stronger than the AX-15, but not a concern unless you really need it. (I'd probably have to burn up two AX-15s to justify hunting down an NV3550) Really the only other consideration is the gearing. AX-15 1st - 3.83:1 2nd - 2.33:1 3rd - 1.44:1 4th - 1:1 5th - 0.79:1 Rev - 4.22:1 NV3550 1st - 4.01:1 2nd - 2.33:1 3rd - 1.39:1 4th - 1:1 5th - 0.78:1 Rev - 3.57:1 Main difference being a slightly lower 1st in the NV, although if you're running 4.10s on stock tires with a 4.0, you're probably not gonna be too worried about 1st's gearing much. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 25, 2011 Author Share Posted December 25, 2011 Good to know.... I found an NV 3550 from a 2000 XJ. Looks like I may just have to settle for that one and finish the 4x4 conversion. Thanks for the info. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 28, 2011 Author Share Posted December 28, 2011 Can anyone tell what this is by looking at the picture? It supposedly came from a 1993 Cherokee? Link to comment Share on other sites More sharing options...
xjrev10 Posted December 29, 2011 Share Posted December 29, 2011 Looks like a AX-15 with a 231 t-case to me. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 29, 2011 Author Share Posted December 29, 2011 Great, that's what I thought.... In that case, I'm picking it up tonight after work. :wrench: Thanks. Link to comment Share on other sites More sharing options...
Pete M Posted December 29, 2011 Share Posted December 29, 2011 just make sure it's not an AX-5. they look kinda similar (and lord knows I can't tell the difference without seeing them next to each other) and are NOT interchangeable. If the XJ had a 4.0, then it's definitely an AX-15. :thumbsup: Link to comment Share on other sites More sharing options...
1tonMJ Posted December 30, 2011 Share Posted December 30, 2011 I am having the AX15 and 231 put in to my Comanche as we speak. I put the axle in my self. Link to comment Share on other sites More sharing options...
Geonovast Posted December 31, 2011 Share Posted December 31, 2011 Some key differences between the AX-4/5 and AX-15 : Shifter mount / midplate: The AX-4/5 has a raised tower where the shifter mounts, while the AX-15 is nearly flush with the rest of the case. The AX-4/5 has a cast iron midplate, and is usually given away by surface rust. The AX-15 has a cast aluminum midplate, and is generally the same color as the rest of the trans. Link to comment Share on other sites More sharing options...
PACIFIER Posted December 31, 2011 Author Share Posted December 31, 2011 I finally got the new tranny and tcase from the trailer into my garage. I also confirmed and it is definitely a 1993 XJ 4.0 AX15 (Serial Number - 53009528). :thumbsup: Now I just need to collect the additional parts for it. Can I use any of the parts from my current Peugeot 2 WD tranny (shifter / brackets)? Link to comment Share on other sites More sharing options...
Pete M Posted December 31, 2011 Share Posted December 31, 2011 Can I use any of the parts from my current Peugeot 2 WD tranny (shifter / brackets)? I reused my clutch since it was almost new. beyond that, nothing swaps over that I can think of. :dunno: edit: you do have to retain your current CPS. :thumbsup: Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now