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Old 04-26-2012, 02:30 PM   #1
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2.5 to 4.0

I have a 1992 Jeep Wrangler I have put a extreme amount of time and money into it to just sell and put all my parts on a 4.0. So I was wondering if it would be possible to buy a fully running working 1992 Jeep Cherokee and use that as a donor vehicle. For engine, transmission, transfer case, wire harness, and the computer. Other than labor is there anything else that i would need to get or am missing?

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Old 04-26-2012, 03:52 PM   #2
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People do it all the time, donor cherokees are very popular. You need good welding skills, a lot of time and effort, another vehicle to drive around, and a couple of buddies to help.

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Old 04-26-2012, 04:50 PM   #3
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As much time as you have invested, its hard to imagine it being more than a full drivetrain swap. There are so many little things that kill you time and expense wise on any sort of swap. Its a labor of love for sure.
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Old 04-27-2012, 12:18 AM   #4
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front and rear drive shafts. Just did the same thing to my 92 got a 94 Cherokee 4.0 H.O. donor moved the frame mounts and re clocked the transfer case put her in, wasn't bad to do took a weekend to pull both out and install the 4.0.
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Old 05-04-2012, 10:58 AM   #5
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Okay thanks for the info but is is there anything to technically with the wiring harness from the 4.0 and new computer mounted onto my 92 yj 4 banger
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Old 05-04-2012, 11:40 AM   #6
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From what I have read and researched:

-Install 4.0 computer
-Wire up additional 2 injectors
-Extend some wiring

And that's basically it, this is of course only for MPFI 2.5L Jeep, which you should have.
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Old 05-04-2012, 11:47 AM   #7
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You also need a tach out of a 4.0 jeep

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