r/ComancheMJ Jun 21 '26

Just wanted to let all the 1987-1990 MJ and XJ owners know that r/RenixCherokeeXJ has been reopened!!

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32 Upvotes

r/RenixCherokeeXJ is dedicated to the discussion of
MJ and XJ Jeeps produced during the Renix years (1987-1990).

I took over moderating this subreddit in order to create a space for Renix XJ and MJ owners to ask questions, share wisdom, and to show off their rides!!

Renix Electronique was a joint venture by Renault and Bendix that designed and manufactured automobile electronic ignitions, fuel injection systems, electronic automatic transmission controls, and various engine sensors.


r/ComancheMJ 2d ago

Free- Shortbed Cap, Tacoma, WA

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18 Upvotes

Giving this away, set up for a Manche with a sliding window. Some of the aluminum frame is cracked near the hatch, it will be going to scrap in mid August. PM to pick up in Spanaway, WA.

I will be starting a full teardown and rebuild, 97 Dash, 8.8 with an OX locker and longarm D30 up front. Goodish fenders and header are available too.


r/ComancheMJ 2d ago

Thank you

9 Upvotes

89 Jeep Comanche was my first truck. Drove it at 13, pops gave it to me at 15. Obsessed with what you do with them. Again thank you for keeping the "Che" rolling. Love this community.


r/ComancheMJ 6d ago

Starting the front end rebuild on the 88 MJ after a brief hiatus

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65 Upvotes

r/ComancheMJ 6d ago

Has anyone tried/knows how to remove a headliner with a sunroof?

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9 Upvotes

Any advice would be greatly appreciated, believe it or not, the sunroof doesn’t leak even after sitting outside for 7 years (famous last words) but I’m having some difficulty figuring out how to get the sunroof out or if I need to, as you don’t see many MJs with sunroofs…


r/ComancheMJ 6d ago

Does anyone know of shift lever adapters from what I believe to be an AX5 to two bolt?

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4 Upvotes

I have the square style and stupidly bought a hurst shift lever, not the whole shifter (because it looks cool) and the new one is a standard two bolt. After searching Google I have come up with nothing…


r/ComancheMJ 9d ago

Anyone install the Leeds rear disc conversion kit?

3 Upvotes

My rear drums started leaking brake fluid pulling into the driveway this weekend.. I'm looking at this as an opportunity to upgrade. Has anyone installed the Leeds rear disc brake kit on their trucks? I haven't seen much for reviews on these.


r/ComancheMJ 11d ago

Trip Day

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87 Upvotes

r/ComancheMJ 14d ago

Picked up today what has been one of my dream trucks for years…

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100 Upvotes

Does anyone know where to get those decals on the sides? I haven’t seen any reproductions for sale or any with that on google images but I haven’t looked too hard… Also where would be the best place to get a seat? Gray interior but has had some mice, might be able to salvage the seat but the whole truck reeks to high heaven


r/ComancheMJ 22d ago

1986 Comanche Parts.

9 Upvotes

Licensed Canadian Automotive Mechanic here looking for some advice.

I am finishing a restore on a very nice 86 Comanche for a friend. This vehicle has alot of sentimental value to the family.

The goal is to keep it original as best as possible.

My biggest question is a best source for parts for a complete differential / axle rebuild. Howls badly.

This differential is a 4:11 Dana 35 with non C clip axles.

I am able to source most parts individual but I am hoping to find a master kit.

The outer axle bearings are grease packed and isolated from the gear oil with an internal tube seal. Not sure how popular this was or availability of parts.

I have a few other parts I need but have the diff apart now.


r/ComancheMJ 23d ago

Drew up an s pod mount for my buddy recently and figured it may be appreciated here

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28 Upvotes

Not absolutely perfect but everything fits together great and it doesnt require any permanent modifications to the shift surround so thats a win in my book


r/ComancheMJ Jun 20 '26

Ranger and Comanche

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43 Upvotes

r/ComancheMJ Jun 18 '26

AX15 4x4 conversion

5 Upvotes

Is anyone here looking to do a 4x4 conversion, or convert a BA10 to AX15? I was planning to do both, and convert my 4x2 BA10 Comanche to a 4x4 with AX15. I picked up a complete 1990 Cherokee with 4.0, AX15, and 231 so that I'd have the crossmembers, mounts, and all the little parts needed. My project is not going to happen, so I need to part with the parts donor. Doesn't run and the body is shot, but does roll freely. Located in coastal central California. Being that a bare untested AX15 (minus bellhousing and xfer case) goes for a grand or more on Ebay, I'm asking $1000 for the whole works.


r/ComancheMJ Jun 17 '26

How to check ring and pinion?

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4 Upvotes

r/ComancheMJ Jun 16 '26

Tis the season. Got the flag back out for some golden hour photos

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64 Upvotes

r/ComancheMJ Jun 11 '26

91 MJ stumbling..

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52 Upvotes

PFA

The old girl is having some issues. 91 MJ 4.0L HO I6 automatic 2WD.

Slightly rough start, out of habit I cycle the key twice and it takes about 5 seconds to get the truck started.

Drives great for a bit and then RPM drops to 500 and you can put the gas pedal to the floor and get no response for about 30-45 seconds, then RPM spikes and she'll drive home.

I thought computer (failed 3 years ago and replaced with a used part), replaced spark plugs and damaged wires. CPS, fuel pump, fuel filter, fuel ballast are only 3 years old. IAC could likely use a clean.

Anything else I should check? Ive daily driven my old girl for years, I had to park her and use the ebike.

TIA


r/ComancheMJ Jun 10 '26

1987 4.0L electrical issues

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42 Upvotes

Made a post a while ago but my account got deleted recently acquired a 87 4.0L manual jeep comanche that I got running after sitting for a few years except now I’m having electrical issues. I have to disconnect and connect the battery bc something is draining the battery and I recently changed the starter motor relay assuming it might be related to that, but also the truck starts with out the key. Could that be the main issue?

Second issue I had completely replaced the fuel system,tank, pump, filter and the fuel gauge isn’t working along with the light for the dashboard.the battery and other icons light up but the dashboard doesn’t.i even tried messing with the light switch knob to see if that maybe did something to the dashboard light but nothing.

Would appreciate if someone could point me in the right direction


r/ComancheMJ Jun 03 '26

Mi MJ with Bronco axle PR 🇵🇷

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65 Upvotes

r/ComancheMJ Jun 02 '26

Rear drive shaft U Joints

2 Upvotes

I'm redoing the U joints on my rear drive shaft. The ones at the transmission end went fine, at the axle end there's no room for a clip to hold the U joint in like there is at the front end. Everything is pressed in, all the needle bearings are properly in place, but the cap just sits there with no way to hold in it. If I jostle the shaft around now the cap just works its way right out. Is there something i'm missing about how it's supposed to sit in at this end?


r/ComancheMJ May 31 '26

First offroad

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30 Upvotes

Took my 88 Comanche offroading for the first time. 4.0 4x4 long bed


r/ComancheMJ May 29 '26

MJ A/C repair

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3 Upvotes

I have a 1988 Comanche Eliminator, the a/c on it doesn’t work but with NC summers I decided to try and fix it. I discover that the problem was the high pressure side charging valve was leaking so I replaced it and charged it to the correct amount of refrigerant. It still didnt work but my gauges were reading 0psi on the low side, and 200psi on the high side. I think the evaporator might be clogged or something but there is this orange part on the firewall with a hose that goes to the drier/ accumulator. The part that goes into the firewall gets really cold when running the A/C and develops frost meaning that it’s where the high pressure becomes low and the system is sort of working. The problem that I’m asking is when I try to find the part I can’t find anything. I can’t find it in any parts diagram, wheather I search expansion valve or orifice tube. I don’t think it needs to be replace but I don’t know why I can’t find it. If anyone knows what it’s called/ part number it would help. And the system is original and charged with R-12


r/ComancheMJ May 21 '26

1988 Jeep Comanche

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163 Upvotes

r/ComancheMJ May 16 '26

Trying to find replacement for this hose

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5 Upvotes

I took it out before I could take a picture with it still installed, but it attaches to the airbox and runs to a metal pipe that pretty much just wraps around the exhaust… it honestly looked pretty janky lol
Does anyone know where to find a replacement part? I tried the Gates Heater to valve HVAC hose but it was definitely wrong.


r/ComancheMJ May 07 '26

What does this plug do, can i run with out it?

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6 Upvotes

Got a 87 Comanche but couldn’t find a new wire harness from the c101 port on the firewall so i had to buy a Cherokee harness, so far it has all the plugs except this one, is this plug vital to run the truck?


r/ComancheMJ May 04 '26

1989 4.0 won't start after driving.

6 Upvotes

I have a 1989 4.0L 5sp renix that starts just fine but after driving for more than 10 mins then shut it off it will not start again unless I wait about 20 mins or give it some Cosby sauce.

It has a new fuel tank, fuel pump, and new fuel filter. I thought maybe the CPS but it will start and stay running after a squirt of starting fluid. Could this be an issue with the fuel rail getting too hot and it vaporizing the fuel in the lines? Any help would be greatly appreciated.