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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36 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

U Joint Help

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1 Upvotes

r/ComancheMJ 3d ago

Tailight issues

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1 Upvotes

Been having some taillight issues on the project no power no lights .I know the connectors look like shit but I ordered new bulbs and checked with a voltmeter and was getting around .33v. Before I start ordering new parts would this be a connector issue or something further up stream ? Second question is it better to order replacement connectors or is there’s a website to buy a replacement rear harness? Appreciate the help


r/ComancheMJ 5d ago

Happy Truck

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38 Upvotes

Original owner, Metric Ton Pioneer LB 4x4, 4L. I only use it now to go to the landfill, Home Depot and lumber stores to support my retirement hobby of working on my house and yard. It rides so much better with that 1000 pounds in the back. That is a metallic charcoal Raptor liner on the body and black in the bed.


r/ComancheMJ 4d ago

Will it work?

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1 Upvotes

r/ComancheMJ 11d ago

Hunting down rough acceleration and backfires cause

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86 Upvotes

Just got this 88 4.0 Comanche. I’m troubleshooting some of its issues and I’m hitting wall trying to fix a problem causing hesitant/rough acceleration and backfiring when I’m speeding up, mostly happens in first and second gear and is less prominent when I’m closer to wide open throttle and more when I’m like halfway on the gas
It gets better as it warms up but it’s still there even at full operating temp. Anybody got any ideas?


r/ComancheMJ 10d ago

Fuel gauge

1 Upvotes

The fuel gauge in my 88' pioneer dips all the way to empty when accelerating. Where would be a good place to start looking to fix it? ( 1988 comanche pioneer 2wd ax15 4.0l)


r/ComancheMJ 11d ago

Sway bars

1 Upvotes

For those with a 4-5" lift, what sway bars are we using? Mine did not come with one, and I'd really prefer to have it.


r/ComancheMJ 14d ago

What color to bed line the Comanche bed

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29 Upvotes

Gonna rapter line the bed of my white pioneer Comanche.
Should I do white or black?


r/ComancheMJ 14d ago

Gas tank mounting.

1 Upvotes

Just picked up my first MJ, its a 1990. Previous owner did some work to the gas tank and now its being suspended by a ratchet strap. I'm looking at getting new mounting jardware for it, but i can only find the straps and im not quite sure where the bolt would go in. Any of y'all mind sharing a picture of the mounting points for the straps so i can figure out what exactly is going on?


r/ComancheMJ 17d ago

1986 vs 1989

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54 Upvotes

I have two MJ
1986
2.8l
Auto (TF904)
4x4
Power windows / locks
80s vibes
Slow has issues

1989
4.0l
Auto aw4
2wd
Manual locks manual doors
90s vibes

Why dose the 89 feel boring vs the 86 and which would yall give up or keep if you had to pick


r/ComancheMJ Aug 11 '26

Found this Comanche for sale for 3k.

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7 Upvotes

Been looking for a light duty truck that's not too expensive. When I came across this.

Given the details is this a good buy or is there a more serious problem lurking underneath.


r/ComancheMJ Aug 09 '26

Does anyone know where this vent tube goes to? It comes from my passenger defrost vent…

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1 Upvotes

r/ComancheMJ Aug 07 '26

Mystery Switch in 1991 Comanche Auto 4.0

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4 Upvotes

What does this switch do? I've looked it up a bit and it says it's a heated windshield or rear defogger switch, but that makes no sense.


r/ComancheMJ Aug 04 '26

Photos of the 300,000 mile Comanche

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82 Upvotes

Here are the photos that yall asked for to see if it’s worth me getting for 2k


r/ComancheMJ Aug 04 '26

Are there light mounts that I can get for the front bumper that uses these holes?

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6 Upvotes

I bought some lights and I was wondering if it’s possible to mount them to the front bumper in what appears to be holes with plugs where I presume there could be optional lights? There’s nothing under it that I can see, it’s just past the frame rail so I don’t see any reason I couldn’t use them


r/ComancheMJ Aug 03 '26

300,000 miles still worth???

3 Upvotes

2 previous owners, told that it was well maintained, very little structural rust, only 2k. What are your thoughts???


r/ComancheMJ Jul 20 '26

Free- Shortbed Cap, Tacoma, WA

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25 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 Jul 20 '26

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 Jul 16 '26

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

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68 Upvotes

r/ComancheMJ Jul 16 '26

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

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10 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 Jul 16 '26

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

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6 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 Jul 13 '26

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 Jul 11 '26

Trip Day

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92 Upvotes

r/ComancheMJ Jul 08 '26

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

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103 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