Which and what year Cherokee is best donor for wrangler - JeepForum.com

 
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post #1 of 12 Old 11-21-2011, 10:17 AM Thread Starter
Lre78hd
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1988 YJ Wrangler 
 
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Which and what year Cherokee is best donor for wrangler

If instead of buying a rebuilt motor I get a 4x4 jeep Cherokee which an what year would be the least headache or least tedious far as fab work and modifing i know somw will be required I have A 88 wrangler 4,2 pukegot.

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post #2 of 12 Old 11-21-2011, 10:18 AM
94chb
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91-95 would be the easiest
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post #3 of 12 Old 11-21-2011, 10:25 AM
dillonjm
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If you're wanting Fuel injection, then yep, 91 -95. They had a lower output 4.0 with a different injection setup IIRC. In 91 then changed to the same setup as the YJ has.

I'd take the computer/wiring/engine/trans/maybe even the t-case out of the XJ and transplant it into yours. You'll probably need to clock the t-case a little to match how the YJ's was run. There are some good writeups on this from people who transplanted AW-4 trannies into YJ's.

13 GC Overland - (Wife's DD) 5.7, stock
Past Jeeps: 99TJ, 78CJ7, 91YJ, 01WJ, 03TJ, 05KJ
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post #4 of 12 Old 11-21-2011, 12:55 PM Thread Starter
Lre78hd
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So what about the 4.0 ho should I go with carb or efi. Ho or not? So I need to find a 91-95 Cherokee auto or manual?
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post #5 of 12 Old 11-21-2011, 01:19 PM
94chb
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if i was you i would put the 4.0 h.o, with the 5 speed(ax-15) from the cherokee since you have the crappy ba10 trans and convert to fuel injection. you will love the difference, i just did mine.

sidenote: to your question on your profile you have a 231j transfer case.
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post #6 of 12 Old 11-21-2011, 01:26 PM Thread Starter
Lre78hd
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Was it relatively straightforward? Remove motor and trans? Replace with 4.0 and mount computer and efi stuff
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post #7 of 12 Old 11-21-2011, 02:25 PM
casper36092
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i have a 92 comanche 4wd auto that was in a wreck that i have parted some of that i can let you have very reasonable if you are interested. i am in alabama so you would have to drive a little to get it though.
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post #8 of 12 Old 11-21-2011, 02:50 PM
94chb
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Quote:
Originally Posted by Lre78hd View Post
Was it relatively straightforward? Remove motor and trans? Replace with 4.0 and mount computer and efi stuff
yes but you will have to wire 5 wires from the cherokee harness into your bulk head to get it to run. and you will also need to find a 91-95 wrangler fuel pump assembly and install it, then hook up the gas lines
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post #9 of 12 Old 11-21-2011, 02:55 PM
jonzjeepyj
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I have a 92 YJ and bought at 99 XJ for the drive train. 92-95 is OBD-I. The 99 XJ
is OBD-II and it's not an easy plug and play. I bought the whole vehicle to make it
easier but it didn't work out. Luckily, I had a friend doing a similar swap. He had
an OBD-I motor going into a 98/OBD-II TJ. We swapped the harnesses and sensors
so it would be plug and play for both of us.

I had a 99 OBD-II / XJ Motor going into a 92 OBD-I / YJ
He Had An 95 OBD-I / XJ Motor going into an 98 OBD-II / TJ

My advice is to stay in the 92-95 range of the YJ's and XJ's to get the fuel injection
and stay OBD-I to make the harness easier to mate. Plug connectors are not the same
so you can't plug the OBD-2 wire harness distributor plug won't plug into the OBD-I
Plug. They are different like most all other wire harness plugs. The other years
can also be done but with a lot more work. You must pinout the wiring connectors
which is a lot more work.


I'm doing the swap as we speak and it won't be together until Wednesday because of
the slow up from the different harnesses

There is no problem that can't be fixed if you throw enough money at it.
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post #10 of 12 Old 11-23-2011, 04:34 AM Thread Starter
Lre78hd
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I have a line on a 93?94 4wd Cherokee 4.0 ho auto. 1) I should be able to just use the motor and tranny and wiring from the xj and install it on my yj? I know I will need the CPU and all related electronics. The trans should work out with some minor modifi action right ? Will I be able to use the axles? If I need one or two later?
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post #11 of 12 Old 11-23-2011, 04:39 AM Thread Starter
Lre78hd
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I wasn't planning on doing a trans swap or at least from manual to auto. But it should not be to tedious? Mod or make some brackets. The drive shafts should bolt up right? I'm not a rock crawler
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post #12 of 12 Old 11-25-2011, 01:06 AM
444
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96+ is OBD-2 electronics. They can be made to work, but they are more complicated.

The Cherokee wiring will absoloutly NOT plug into your YJ. You would need to dissect the cherokee harness and your yj harness and merge the two together. Lots of rewiring. It's doable but it's not plug and play. You will need a service manual or at least a good wiring diagram and you will need a grasp of how an efi system works if you want to tackle the rewiring job. If you want plug and play you will need a harness out of a 4.0 YJ.

If you take the engine, trans and transfer case out of the cherokee, it will fit. The auto trans will need a shifter installed, so either you find a YJ column for automatic or buy an aftermarket generic type auto trans shifter.
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