Swampy Posted August 20, 2017 Share Posted August 20, 2017 Hey people, As some of you way know of my build thread "Wendy". Well I have a 1988 Comanche with a 2.5l inline 4 (tbi) and a 1988 Cherokee with a renix 4.0l/aw4/np242 drivetrain. I tried to start the Cherokee but it was just cranking (not turning over) sounded like it had a rod knock and some smoke was coming out of the dipstick https://www.youtube.com/watch?v=keTuB2oHwsY (wasn't sure how to make the video thumbnail appear) But I'm not 100% sure what it is. It sounds like knocking. Because of this, was going to keep the 2.5l in the Comanche, and just make the best of it. My real question is, would I be able to "fix" the 4.0l for around or less than $700? Because if it is more than that I might as well swap in an ax5 behind the 2.5 and just save for the time being Link to comment Share on other sites More sharing options...
mnkyboy Posted August 20, 2017 Share Posted August 20, 2017 4.0ls are pocket change,you could pick up a good one for cheap. Or be different and build the 2.5l. Link to comment Share on other sites More sharing options...
omega_rugal Posted August 20, 2017 Share Posted August 20, 2017 yep that 4.0 is damaged, you can get a good one cheap... but keep that one it begs for a rebuilt Link to comment Share on other sites More sharing options...
Jeep Driver Posted August 20, 2017 Share Posted August 20, 2017 Allow me to open your can of worms. I don't want to be accused of giving bad advice, everyone has to take their own path. You asked me about my 2.5, I would not encourage you to do what I did, you'll be disappointed. Knowing what I know now, I would never do a 4.0 swap. Too much work, time, effort, money for the return. And no, I promise you you will not fix nor rebuild your current 4.0 for anywhere near $700. Machine work alone will chew that up. You've already stated that you don't have the tools.....and I'm assuming space....... I would encourage you to rethink what you want to accomplish and come up with a plan. Link to comment Share on other sites More sharing options...
Swampy Posted August 20, 2017 Author Share Posted August 20, 2017 Thanks for the info guys. I wanted a second opinion about the motor, if it would have been a cheap I probably would have considered the swap. The plan is to keep the 2.5 I going to stay 4cly. May try to find the parts to swap to mpi. But parts for sure getting An intertia ring Regearing the axles Probably getting a cam and boring the 2.5 And new wires, distributor etc Link to comment Share on other sites More sharing options...
Pete M Posted August 20, 2017 Share Posted August 20, 2017 to add to your upgrade musings, I recently found out that the Liberty rear axle can be found as an 8.25 with disks and is a couple inches wider than stock. (the 35 was also available). I always thought they were the same width as an XJ, but I measured my '06 Libby. neat :D don't forget to swap out your mech fan for an electrical. :thumbsup: Link to comment Share on other sites More sharing options...
Swampy Posted August 20, 2017 Author Share Posted August 20, 2017 to add to your upgrade musings, I recently found out that the Liberty rear axle can be found as an 8.25 with disks and is a couple inches wider than stock. (the 35 was also available). I always thought they were the same width as an XJ, but I measured my '06 Libby. neat :D don't forget to swap out your mech fan for an electrical. :thumbsup: Oh that's awesome any year liberty? or a specific range? And yes an electric fan is definitely going to be a nice upgrade as well Link to comment Share on other sites More sharing options...
Swampy Posted August 20, 2017 Author Share Posted August 20, 2017 Does anyone know anything about stroker kits for the 2.5l? I have done some research and this company called 505 performance Link to comment Share on other sites More sharing options...
Pete M Posted August 21, 2017 Share Posted August 21, 2017 mine is an 06. I'd imagine they are all the same width. car-part.com can help you find one in a junkyard. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 21, 2017 Share Posted August 21, 2017 Does anyone know anything about stroker kits for the 2.5l? I have done some research and this company called 505 performance I don't think stroking a 2.5 would do much good. You would get more bang for the buck with a supercharger. Check out mnkyboy's build thread if you haven't already. He's done some nice work with his. http://comancheclub.com/topic/16226-mnkyboys-89-comanche-project/page-28 Link to comment Share on other sites More sharing options...
Pete M Posted August 21, 2017 Share Posted August 21, 2017 gears are your best bang for your buck. choose them wisely :D Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 21, 2017 Share Posted August 21, 2017 :agree: Gearing is very important too, but I was referring to engine performance mods. Link to comment Share on other sites More sharing options...
Pete M Posted August 21, 2017 Share Posted August 21, 2017 gears + boost = :banana: Link to comment Share on other sites More sharing options...
Swampy Posted August 21, 2017 Author Share Posted August 21, 2017 Does anyone know anything about stroker kits for the 2.5l? I have done some research and this company called 505 performance I don't think stroking a 2.5 would do much good. You would get more bang for the buck with a supercharger. Check out mnkyboy's build thread if you haven't already. He's done some nice work with his. http://comancheclub.com/topic/16226-mnkyboys-89-comanche-project/page-28 gears are your best bang for your buck. choose them wisely :D gears + boost = :banana: I checked out his thread and that supercharger set up is crazy haha. I would first have to swap my tbi to mpi before I can think about supercharging my motor. That's why I was thinking of stroking it, I know its beating a dead horse :yes: now my I'm considering boost lol I was planning on going with 5.13 gears with a 5sp and 35s. I was going to go 4.88s but I was afraid they would not be enough Link to comment Share on other sites More sharing options...
SBpunk Posted August 21, 2017 Share Posted August 21, 2017 Does anyone know anything about stroker kits for the 2.5l? I have done some research and this company called 505 performance I don't think stroking a 2.5 would do much good. You would get more bang for the buck with a supercharger. Check out mnkyboy's build thread if you haven't already. He's done some nice work with his. http://comancheclub.com/topic/16226-mnkyboys-89-comanche-project/page-28 gears are your best bang for your buck. choose them wisely :D gears + boost = :banana: I checked out his thread and that supercharger set up is crazy haha. I would first have to swap my tbi to mpi before I can think about supercharging my motor. That's why I was thinking of stroking it, I know its beating a dead horse :yes: now my I'm considering boost lol I was planning on going with 5.13 gears with a 5sp and 35s. I was going to go 4.88s but I was afraid they would not be enough 5.13 you'll need a new front axle since D30 only allows up to 4.88. Even with 4.88 you're running a very small pinion. On 35s an 8.8 or 9 inch would probably be a safer bet. As for the front you'll have to ask around. Link to comment Share on other sites More sharing options...
mnkyboy Posted August 21, 2017 Share Posted August 21, 2017 Revolution gear makes 5.13s for the D30. I had 4.88s with the TBI 2.5l and 33s, it worked pretty good especially since i had been running stock 3.55s with 33s before,it was a huge difference. When i built the MPI engine i went to 5.38s and 37s,it pulled good even before the supercharger. Link to comment Share on other sites More sharing options...
Swampy Posted August 21, 2017 Author Share Posted August 21, 2017 Revolution gear makes 5.13s for the D30. I had 4.88s with the TBI 2.5l and 33s, it worked pretty good especially since i had been running stock 3.55s with 33s before,it was a huge difference. When i built the MPI engine i went to 5.38s and 37s,it pulled good even before the supercharger. I think there is a few companies that make 5.13 gears for the d30. A few guys over on pirate have been running 5.13 gears locked and haven't had an issue. Link to comment Share on other sites More sharing options...
mnkyboy Posted August 21, 2017 Share Posted August 21, 2017 There have been 5.13s for the JK D30 for a while but they are different. Revolution gear is the only company as far as i know that is making them for the older D30. Link to comment Share on other sites More sharing options...
Swampy Posted August 23, 2017 Author Share Posted August 23, 2017 I don't know how put the d30 I have is a high pinion non vacuum ( it doesn't have the disconnect on the passenger side axle tube) out of an 88 Cherokee wouldn't be the same as all the other xj front axles? Link to comment Share on other sites More sharing options...
mnkyboy Posted August 24, 2017 Share Posted August 24, 2017 All XJs with a full time transfer case got the non disconnect D30. The disconnect D30 was used in 84-91 XJs with a part time case. Both versions were high pinion, yours is probably from an XJ that had a 242 transfer case. Link to comment Share on other sites More sharing options...
Swampy Posted August 24, 2017 Author Share Posted August 24, 2017 All XJs with a full time transfer case got the non disconnect D30. The disconnect D30 was used in 84-91 XJs with a part time case. Both versions were high pinion, yours is probably from an XJ that had a 242 transfer case. Yeah the xj has a 242 case and that is going in the Comanche as well. So the front axle is the non disconnect version? Link to comment Share on other sites More sharing options...
mnkyboy Posted August 24, 2017 Share Posted August 24, 2017 It will be a non disconnect but unless it has ABS it will have the smaller Spicer 5-260X joints. It's not a big deal though as the larger 5-297X/5-760X joint shafts will drop right in. Link to comment Share on other sites More sharing options...
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