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Unread 04-30-2012, 01:26 AM   #136
Prekman
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1994 YJ Wrangler 
 
Join Date: Mar 2009
Location: Athens Greece
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Thx guys, in fact here in Greece a complete 318+auto trans+transfer case can be found in + - the same price as the 318 engine + an AX15. Only 5.2 Limited Grand's were imported here with the 318 motor on, so they have all automatic transmissions.
I have a 2.5 YJ so I will drop the AX5 in all cases... Mopar wouldn't be safer to keep the 2WD option in a YJ with D35 rear + D30 front? I think i've read a post about changing the permanent 4WD to a 2WD..I even think it was for a WJ..not sure though.

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Unread 04-30-2012, 05:49 PM   #137
MoparFreak69
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I see what you are saying. You can just put your existing transfer case from behind the AX-5 onto the A518/618 and keep your regular shift pattern and still have 2wd. You will need to rotate the transfer case up a bit from how it sits and re-drill the mount holes so that it sits correctly in your YJ. It is very easy to do, just takes a few minutes of time with a drill and a marker. I had to do it with my AX-15 that came out of a Dodge Dakota pickup.
An automatic is still a pretty good option though and will still give you the biggest smile on your face you can imagine. A ZJ is a perfect donor for this swap and it should go really easy if your friend has any fab skills.
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Unread 09-10-2013, 10:20 PM   #138
skyj
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Sub'd excellent write up and info moparfreak I have found a 5.2 out of a grand cherokee and a complete wire harness and PCM out of a '93 dodge 1/2 ton truck with manual trans for real cheap and want to do this swap. the truck wire harness and PCM will work with the grands 5.2 right?? I have also sourced a v6 dakota bell housing now just need to find a 5.2 fly wheel to make the package complete, and external fuel pump. I hope im on the right track with all of this. cant wait to have a V8 wrangler.
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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 09-10-2013, 10:37 PM   #139
MoparFreak69
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Yes, they will all work together just fine. The only differences you may find is sensor/injector connector changes. You may have to get sensors /injectors from the '93 truck if you run into this, easy remedy though.

I need to update this info as I felt the need to make a minor change lately. The change I am working on is to get rid of the external fuel pump and go with an internal one. The external one is starting to have problems overheating, which should be taken care of with an internal one. My YJ has a 15 gal steel tank so I found and bought a 20 gal plastic tank and skid. I can then just drop in a MPFI sender and pump and be done with that problem. Cost will run about the same as an external pump so win-win.
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90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
[SIZE="5"][URL="http://www.jeepforum.com/forum/f22/myj-build-2-years-ago-today-1197236"]MYj Build[/URL][/SIZE]
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Unread 09-10-2013, 10:41 PM   #140
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Sub'd.

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Unread 09-11-2013, 12:23 PM   #141
skyj
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Options, options. I went to the salvage yard today in search of a wire harness and computer. Wow!! was it slim pickens none of them had a dodge ram with a manual, all autos. my three options I see are this: I found a '92 dodge ram 5.2 2 wheel drive auto with harness and computer but it was crunched in the fender right where the computer mounts doesnt look ruined but the plastic casing is cracked around the computer. useble maybe?? can get it for cheap if so?? or a harness out of a '95 dodge ram 4 wheel drive auto 5.9 with complete harness?? then last but not leaste a '93 grand cherokee auto with the 5.2 complete harness and computer. seems like my only option is a one with an auto, so will that cause me problems since you say you had diffuclty with yours dying on you when down shifting right? and of course none of the yards had a dakota with a v6 so I could rob a bellhousing. still checking into a few yards a ways from town that might have what Im looking for. boy I wish I had Jalopy Jungle back in Nampa still.
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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 09-11-2013, 12:40 PM   #142
MoparFreak69
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Getting the proper VSS, and wiring it right cured the dying problem.

You can use an auto harness, you just have to cut out the extra wiring you wont need. You can still connect it to a manual trans computer if you want.
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90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
[SIZE="5"][URL="http://www.jeepforum.com/forum/f22/myj-build-2-years-ago-today-1197236"]MYj Build[/URL][/SIZE]
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Unread 09-11-2013, 01:42 PM   #143
skyj
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So should I go with the '92 dodge harness and computer and and hope the computer isnt toast from the wreck he said he will take it back if it dooesnt work or can I grab the cherokee computer and use it with the 92 harness. sorry for all the questions!
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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 09-19-2013, 10:46 PM   #144
SH00T3R
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Sub'd up, Im in the middle of my swap and need all the info I can get. Thanks for making such a detailed write up! I still have allot of work to do, but Im hoping to have it running by christmas. I'm sure ill be back to ask you a ton of questions.
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Unread 09-20-2013, 03:30 AM   #145
SunDevilJeeper
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Quote:
Originally Posted by skyj View Post
So should I go with the '92 dodge harness and computer and and hope the computer isnt toast from the wreck he said he will take it back if it dooesnt work or can I grab the cherokee computer and use it with the 92 harness. sorry for all the questions!
I didn't read your earlier posts, but if you're going manual, and the Dakota had a manual computer, I'd go with the Dakota puter. If it's an automatic, wouldn't really matter you'd think.
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Unread 09-20-2013, 03:50 AM   #146
mike_breaker_5
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Quote:
Originally Posted by skyj View Post
So should I go with the '92 dodge harness and computer and and hope the computer isnt toast from the wreck he said he will take it back if it dooesnt work or can I grab the cherokee computer and use it with the 92 harness. sorry for all the questions!
on OBD1 it makes no difference. you can use any 5.2/5.9 ECM auto or manual and it will work just fine. as far as wiring harness, either will work as well.
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Unread 10-08-2013, 03:38 PM   #147
tobyw
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I just acquired an '87 YJ that the previous owner installed a '95 Grand Cherokee 5.2L and 46RH into... After a bunch of schematic reading and other research, I essentially followed your hand-drawn wiring diagram and it fired right up and idles pretty well. However, it runs EXTREMELY rich. Any ideas on what to look for there? Right now I still don't have the radiator hooked up so I've only run it for 20-30 seconds at a time, but that is more than enough to fumigate my 36x48 shop. I also don't quite comprehend the VSS signal - where does that come from?? Is that from the crank sensor or something already buried in the OEM harness?
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Unread 10-08-2013, 08:37 PM   #148
Awesome
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Originally Posted by tobyw View Post
I also don't quite comprehend the VSS signal - where does that come from?? Is that from the crank sensor or something already buried in the OEM harness?
VSS is the Vehicle Speed Sensor - it is the speedometer sensor and will be on the rear of the transfer case. It reads the final drive speed.
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Unread 02-12-2014, 12:32 PM   #149
XJ93
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Very good info in this thread. Thanks Mopar. Gets me thinking I should buy my neighbors 96 Dakota V8. I was thinking about this kind of swap over the past weekend when my neighbor told me he was thinking of selling his old truck. My first thought was buy it, strip it, and swap the whole driveline into the YJ. I personally was thinking of swapping the intake out for a carb though, I HATE wiring. What did you end up doing for a fuel pump Mopar? What about you other guys who've done this swap?
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Unread 03-26-2014, 08:55 PM   #150
MoparFreak69
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Quote:
Originally Posted by XJ93
Very good info in this thread. Thanks Mopar. Gets me thinking I should buy my neighbors 96 Dakota V8. I was thinking about this kind of swap over the past weekend when my neighbor told me he was thinking of selling his old truck. My first thought was buy it, strip it, and swap the whole driveline into the YJ. I personally was thinking of swapping the intake out for a carb though, I HATE wiring. What did you end up doing for a fuel pump Mopar? What about you other guys who've done this swap?


I used an external fuel pump that I sourced based on pressure and engine size from Napa auto parts. It is an Airtex unit that seems to be holding up fine, going on 3 years now.
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90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
[SIZE="5"][URL="http://www.jeepforum.com/forum/f22/myj-build-2-years-ago-today-1197236"]MYj Build[/URL][/SIZE]
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