Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: giorno71 on July 16, 2008, 09:00:47 PM

Title: engin swap
Post by: giorno71 on July 16, 2008, 09:00:47 PM
will a 4.0 out of a 90 Cherokee  bolt into a 94 yj  or do i have to move motor mounts?
has a 2.5 in it and i have the Cherokee  transmission and t/c
Title: Re: engin swap
Post by: hps4evr on July 16, 2008, 10:08:48 PM
i think scott did that exact swap! im gonna say yes, new motor mounts and maybe frame mounts as well. scott (blackyj) had this done on his YJ, but im not certain which drivetrain he had before the swap. good upgrade though.
Title: Re: engin swap
Post by: rws on July 17, 2008, 09:19:21 AM
87 to 90 had the Renix management system so the 90 computer and wiring will also have to be swapped in.
Title: Re: engin swap
Post by: BlackYJ on July 22, 2008, 12:32:05 PM
will a 4.0 out of a 90 Cherokee  bolt into a 94 yj  or do i have to move motor mounts?
has a 2.5 in it and i have the Cherokee  transmission and t/c

I have done the swap with a XJ drivetrain.  The best is to find a donor that is very close to the year of your YJ.  I got lucky and found a 94 XJ that I used in my 95 YJ.

The frameside motor mount DO have to be moved and you will need the computer for the donor.  It is not as simple as it sounds but it can be done.  If you have more questions, just let me know
Title: Re: engin swap
Post by: mrbeggins on July 26, 2008, 02:10:22 PM
we (father and i) have an 87 yj that had the 2.5l in it, took that out and swapped a 4.0l into ouf of a 90 xj. the 2.5 was a standard. the 4.0 is an auto. so we did quite a bit of fabricating to make everything fit just right. Mostly the 4wd linkage. motor mounts had to be moved back aswell. wiring harness and everything came out of the cherokee and straight into the yj. only thing we dont have is a speedo and gas gauge. hense..mr.jerry can ;D