Results 1 to 3 of 3

Thread: XJ to YJ Eng

  1. #1
    Fresh Catch
    Join Date
    Mar 2019
    Monroe, NC

    XJ to YJ Eng

    I have recently came into a 2000 XJ with a perfectly running 4.0. I have the whole vehicle and was going to swap it into my sons YJ that has a weak 2.5. The XJ is a 2wd auto and the YJ is 5 spd. If possible I would like to convert the whole thing into the YJ to make it a 4.0 auto 4wd. Can anybody get me started with the correct path to accomplish this or at least the best way to swap the motor in to give it more power.

  2. #2
    Nothing but a Thing QuicksilverJK's Avatar
    Join Date
    Apr 2016
    Reno NV
    You will need the engine, harness and ECM. Get a flywheel and clutch for that year manual 4.0. As far as engine mounts are concerned, I'm not 100% sure, but I would assume that the 4.0 or 4.2 depending on year of YJ engine mounts should do the trick.

    Sent from my iPhone using WAYALIFE mobile app

  3. #3
    Knows a Thing or Two pop2tu's Avatar
    Join Date
    Feb 2013
    High desert Ca
    To use the auto transmission. If you are going to swap out and use the 4.0 XJ computer, you will need to find a 4wd transmission from a 98-2000 XJ. I converted my sons 98 XJ from 2wd to 4wd. We got a trans from a 97, it doesn’t have a front input speed sensor. I heard that it would work we put it in. It would not shift. It stayed in second, unless we disconnected the trans module, then it was a manual shift. We ended up taking both trans to friend that rebuilds transmissions for a living and he made 1 trans out of 2. Because of the internal components and having to use the 97 tail shaft now the rear speed sensor has to be from the 97 trans. The computer doesn’t read it, and check engine light is on. It will shift fine but can’t get the light to go off.

    Hope this help

    Sent from my iPhone using WAYALIFE mobile app

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
“wayoflife” is a moniker that I’ve been using for 20 years now and I chose it because I think it does a great job of explaining, in simple terms, the passion I have for Jeeps and the Jeep way of life. This is a lifestyle that transcends age, gender and race as the only thing you need to be a part of it is a love for the outdoors, a desire to explore, a yearning to take on a challenge and a will to conquer it. Over the years, Cindy and I have attempted to capture the essence of this lifestyle through photographs and videos and share it with others around the world. And, this is how WAYALIFE was born.
Join us