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New To Me Mj


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I very recently bought this 1990 2wd 4.0 AW4. It only has 100k on it, runs great and the best part is it appears to be rust free. I currently DD a 1995 4wd XJ, it's just really falling victim to ohio rust, so my current plan is to take the 4wd components out out of the XJ and swap them to the MJ. I have researched extensively yet but it seems like all that is involved to swap transmission, transfer case and associated linkages, front shaft, and front axle (not sure if that means steering and suspension parts need to be swapped, would love to keep as many MJ steering and suspension parts as it looks to be in better shape). I am interested in any info any of you have on improvements and parts that I can swap out of the cherokee or even junkyard XJs other than the 4wd parts, creature comfort parts essentially. Here are pics of the MJ and then the current DD and future parts donor XJ.

 

 

 

 

 

 

 

 

 

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I did buy it off daveys, Drove down when he opened on Friday morning loaded it on the trailer and brought it home, as soon as I saw how clean it was it was a done deal for me. I am located in northfield.

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Funny you mention akron, I lived there for almost 10years during my youth. good to know there at others into Comanches that are semi local.

 

So I'm still getting all my info sorted out and waiting for the state inspection before I really start swapping parts over. I am planning on leaving the renix engine in the comanche but using the trans and such from the XJ. My question at the moment is what external engine parts can be swapped over from the HO to the renix? I ask because on the XJ in the last year it has got a new water pump, alternator, thermostat housing, valve cover with reusable metal impregnated gasket, power steering lines, etc.

 

Also when swapping over the front axle from the XJ, will I have to swap all the steering components over as well? (Tie rod, tie rod ends, track bar, sway bar, end links, stabilizer etc?) most are less than a year old on the XJ but if I could reuse what's on the MJ and save that time and then save the XJ parts are spares and future replacements that would save me some hassle.

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Just replaced the driveshaft u joints, valve cover gasket, ccv parts, changed oil and trans fluid, it seems like in the 100k mi the truck hS no one ever thought to change the oil. Tons of built up sludge under the valve cover, ending up spending an hour scrapping and vaccumming out the large pieces, it was so bad that both orifices had to be cleaned out with a chisel and hammer. On suggestion of a old car guru I know I subtracted one qt of oil and supplemented a qt trans fluid with plans to change weekly until it cleans up a bit more.

 

Also I took some pics of the under body while I had it up on the lift, here is how clean this truck is:

 

 

 

 

 

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  • 2 weeks later...

So after taking awhile to get some parts together, I plan on swapping out my steering column. I currently have a busted column shift column in the MJ now. I will be swapping in a column from a 91 5speed. And I have grabbed the half console, tunnel plate, floor shift assembly, shift cable from handle to trans all from the same 94 XJ from the junkyard. Plan on doing the swaps in the morning, anything I am missing ?

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The column was completely missing some parts when I received it. It needs some washers and an upper steering bearing. Otherwise it is a repairable unit. It was simply easier for me to get the floor shift parts than it was to get the bearing. And after I swap in 4wd down the road I will have to install the shift lever in that space so I would have converted it then anyways.

 

http://comancheclub.com/topic/41815-steering-wheel-slop/?do=findComment&comment=423393

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So I haven't got much done lately, but I did get to change the distributor cap, wires, plugs, rotor, replaced the vacuum harness with one I got from rockauto. Changed the air and fuel filters. And mounted the half console , shifter plate and shifter for the floor shift, still waiting for the correct floor shift cable to come into the part store though.

 

This is what I found when I pulled the air filter. So as a reminder pull your air filter and clean and change you ccv system.

 

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  • 4 weeks later...
  • 1 month later...

Looking good.  I see you currently have the 3 wire VSS in the NP231.  What are your plans for the speedometer? My donor T-case is from a '96 XJ and also has the 3 wire VSS.  From what I can tell the 2 wire setup from the 2WD AX-15 will drop right in.  Is it the same deal with the mechanical speedo on your '90?  Also are the 2WD and 4WD AX-15 trans to X-member brackets the same?

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With the speedo, I have the electronic pieces in there just so I don't have an open hole. My mechanical speedo does seem to hook up just fine it just simply isn't long enough to reach the transfer case. I plan on finding a speedo cable from either a 4wd XJ or MJ and then it should bolt right in.

 

And for the ax 15 crossmember brackets I actually have no idea as I actually have an AW4 in mine. Although if it helps the aw4 seems to be the same regardless of it being 2wd or 4wd.

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Front axle from the 95 XJ, pic taken before degreasing and pressure washing. The axle is currently sitting in the bed of the comanche waiting for the weekend to install.

 

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  • 3 weeks later...
  • 1 month later...

Started on the body work, taking longer than expected. Thankfully the body is rust free and pretty much straight, I'm just taking my time and making it smooth.

 

 

 

Getting closer but still not right:

 

Still got some more work ahead:

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  • 2 months later...

Swapped to my HO engine and kept the management systems all renix. Before swapping in the engine got new gaskets (oil pan, Rear main etc), new oil pump, timing chain.

 

Took just shy of eight hours start to finish.

 

 

 

 

 

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  • 1 month later...
  • 11 months later...

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