AZMJ89 Posted Tuesday at 11:46 PM Share Posted Tuesday at 11:46 PM First post here, sorry for the newb question, I got an 89 2.5L that I am in the process of swapping a 91-95 4.0 HO AX-15 drivetrain in. I've found out that the fuel pump is different between the 2.5 and the 4.0, and it's almost impossible to find an MJ specific 4.0 pump assembly these days. I think it leaves me with the option of swapping to a Dakota or TJ tank, which most people do with 97+ swaps. Do I have any other options? Link to comment Share on other sites More sharing options...
Limeyjeeper Posted Wednesday at 01:04 AM Share Posted Wednesday at 01:04 AM MTS has a full assembly for the 91. Link to comment Share on other sites More sharing options...
ghetdjc320 Posted Wednesday at 02:11 AM Share Posted Wednesday at 02:11 AM As Limey said, MTS. JPSU-7 is the part you need. Link to comment Share on other sites More sharing options...
AZMJ89 Posted Wednesday at 02:42 AM Author Share Posted Wednesday at 02:42 AM Thanks guys! That saved me a lot of fab work and get to keep my spare tire location. I think I still need to track down 4.0 fuel lines right? Link to comment Share on other sites More sharing options...
fiatslug87 Posted Wednesday at 02:52 AM Share Posted Wednesday at 02:52 AM If you are keeping the RENIX cluster you need the 87-90 sending unit. Link to comment Share on other sites More sharing options...
AZMJ89 Posted Wednesday at 05:09 AM Author Share Posted Wednesday at 05:09 AM I like the look of the renix gauge cluster but I am also replacing the wiring under the dash with a 92’ harness, I believe this is also required to do the swap.I’m not sure how compatible the renix cluster is with the 92’ harness. I think I read somewhere that you have to switch the polarity on the floater wires to get the gas gauge to work when using older pump and newer cluster and vice versa. I guess I better start my build thread soon so I can share my experiences as I go along for others to learn. I better work on my signature too, I have a 93 ZJ and a 94 XJ. Link to comment Share on other sites More sharing options...
eaglescout526 Posted Wednesday at 06:07 AM Share Posted Wednesday at 06:07 AM You’ll have to change almost everything if you’re going to HO swap(Minus the engine if you’re keeping Renix). But I don’t know much about those swaps. Anywho if you do, cluster, sending unit and you’ll need a speed sensor to work with the cluster. But I think you can keep the Renix cluster and use the 92 harness as I think the speedo has its own plug? I could be wrong. Also depends on the Renix cluster you have. 3 clusters carried over to HO. The full red and black cluster package The 5/6 blue cluster package and the idiot lights Link to comment Share on other sites More sharing options...
ghetdjc320 Posted Wednesday at 07:40 AM Share Posted Wednesday at 07:40 AM The actual resistance sweep is different between renix and HO aside from being reversed. For an accurate gauge, match your sender to the cluster. The HO requires a VSS signal. You can retain a renix cluster with mechanical speedo by swapping in a 91-92 YJ VSS. It has a pass through for the manual speedo cable and your VSS wires. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now