89JeepMJ Posted April 8, 2015 Share Posted April 8, 2015 I know they don't make them anymore. I've been getting by with the gauge reading a quarter tank off. Jumping to full or empty or not reading at. Adjusted the needle a couple times so it's reads right. Just a pain not getting accurate readings. I know most guys are going to say get one from the junk yard. Has anyone done anything else though. Like maybe a cherokee tank swap and converting it. I don't know. any ideas would great thanks. Link to comment Share on other sites More sharing options...
wvzj Posted April 9, 2015 Share Posted April 9, 2015 Have you thought about sending it off to get repaired? There are still a few shops around that provide this service. Link to comment Share on other sites More sharing options...
89JeepMJ Posted April 9, 2015 Author Share Posted April 9, 2015 Shops that specialize in that? Link to comment Share on other sites More sharing options...
Jeep Driver Posted April 9, 2015 Share Posted April 9, 2015 http://www.bobsspeedometer.com/1/120/services.asp Link to comment Share on other sites More sharing options...
neohic Posted April 9, 2015 Share Posted April 9, 2015 A while back I ran into the issue a while back that everything on the inside of my sending unit was fine but everything outside the tank was rusted and leaking. I went a little different route though and made up a new chassis for everything to mount on to. While this was a fun little experiment, it was also intended that one could use this same chassis to mount the internal parts of a Cherokee sender (as everything is pretty much the same inside of a Cherokee tank, IT JUST ALL MOUNTS IN MIRRORED from a Comanche causing interference problems) and thus have an easy replacement option. Stainless chassis in comparison to stock RENIX chassis: HO sending unit that actually got used (notice the J B Weld on the inside of the mounting flange): Cut: New chassis mounted to existing tab: Plumbed: View from inside a LWB tank to make sure everything sat just where it should without interference: What's really cool about it is that I used pipe couplers at the mounting flange so I could then use barb fittings both inside and out: This way, I could still have the 5/16" and 3/8" (or is it 1/4" and 5/16"?) for the send and return lines outside of the tank while everything inside is based off of 5/16" (or was it 1/4"?). Anyhow, this combination could also be used with a hacked off Cherokee unit that doesn't have a return line, they could both be plugged easily if one were to do a custom pump but still retain the factory gauge sender, or the chassis could also be easily modified to mount a '97+ Cherokee pump and sending unit if doing that swap to keep the Comanche tank unmodified... lots of possibilities with this setup. The only part of the wiring that had to be modified was the ground. Originally, it was soldered on to the flange but that's an easy fix. Also replacing the o-ring and locking ring for the rest of the wiring was a must: Under the truck: Sure, I needed to run longer hoses outside the tank but I guess I could've used 90* fittings. I ran the truck this was for about a while without any issues. It was then sent back home to it's previous owner who also isn't having any issues with it. Been a few years like this, anyhow. The plan a while back as to make up a few more chassis to sell... might still get around to that. :dunno: Link to comment Share on other sites More sharing options...
89JeepMJ Posted April 9, 2015 Author Share Posted April 9, 2015 So a cherokee one would work with modifications? Link to comment Share on other sites More sharing options...
Jeepman Posted April 9, 2015 Share Posted April 9, 2015 Yes I bought a brand new XJ sender (make sure it matches your year MJ) and then cut/stretched and twisted it to make it into an MJ sender and worked perfect... This is the Brand New XJ Sender Image Not Found This is the Old MJ Sender Image Not Found And side by side Image Not Found I never did take any pics of the finished sender after modification... Link to comment Share on other sites More sharing options...
89JeepMJ Posted April 9, 2015 Author Share Posted April 9, 2015 Do you have to change the wire plug or did you hard wire it? Link to comment Share on other sites More sharing options...
Jeepman Posted April 9, 2015 Share Posted April 9, 2015 I am not 100% sure but I think the connector was the same but I definitely did not hard wire mine... Link to comment Share on other sites More sharing options...
89JeepMJ Posted April 9, 2015 Author Share Posted April 9, 2015 That's pretty amazing that everything works and by 180ing everything. I'm deffintly going ahead and doing this. Thank you for your help everyone Link to comment Share on other sites More sharing options...
Jeepman Posted April 9, 2015 Share Posted April 9, 2015 its 180ing and stretching it a bit as the MJ sender goes in farther then the XJ but its easy to do... Link to comment Share on other sites More sharing options...
89JeepMJ Posted April 10, 2015 Author Share Posted April 10, 2015 really shouldn't be that hard. I'm going to order one and get it done. Link to comment Share on other sites More sharing options...
GregM Posted April 12, 2015 Share Posted April 12, 2015 Tri Starr claims they can rebuild them: www.tristarrradiator.com (315) 712-0071. I just bought a 73k mile Comanche from a friend of mine, who bought it from another friend of mine. Needed a bunch of work and a SMOG certificate (California vehicle) but that is all done except for a nasty front axle noise that we'll tackle on Monday. It also needs a fuel sending unit. I'd like to give Tri Starr a try but would like to find a used unit that I can send in so the vehicle is not down. Does anyone have a used sending unit they would be willing to sell? I'll take some photos before and after and report on how Tri Starr does. - Greg Link to comment Share on other sites More sharing options...
cruiser54 Posted April 12, 2015 Share Posted April 12, 2015 Ever seen this? http://comancheclub.com/topic/33662-refurbishing-the-fuel-sender/ Link to comment Share on other sites More sharing options...
GregM Posted April 13, 2015 Share Posted April 13, 2015 Thanks, I had not yet come across that thread. I have a friend who is supposed to drive my Comanche back to the Midwest whenever I finish the repairs, so I don't want to start taking things apart that I might not be able to immediately fix. Thus I'd like to get a used repairable unit that either I can fix or have Tri-Starr fix. I can always modify a Cherokee unit but am fond of trying to stay with original parts when possible. Link to comment Share on other sites More sharing options...
GregM Posted May 2, 2015 Share Posted May 2, 2015 Still looking for a non-functional one to have rebuilt, if anyone has one laying around... Link to comment Share on other sites More sharing options...
Kickinmule Posted May 2, 2015 Share Posted May 2, 2015 Still looking for a non-functional one to have rebuilt, if anyone has one laying around... I think I have one. I will get back to you this evening. Link to comment Share on other sites More sharing options...
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