FLASHBACK Posted June 30, 2008 Share Posted June 30, 2008 how easy or hard is a 4.0 swap in to my 4cyl mj i would buy a complete xj to swap from so that would give me harness ecu....... i only wonder if there is alot of fabing like mounts or anything like that. Thanks Travis Link to comment Share on other sites More sharing options...
JeepcoMJ Posted June 30, 2008 Share Posted June 30, 2008 how easy or hard is a 4.0 swap in to my 4cyl mj i would buy a complete xj to swap from so that would give me harness ecu....... i only wonder if there is alot of fabing like mounts or anything like that.Thanks Travis is your 4 cylinder an 87 and/or newer? if so, everything will bolt in. mid-87+ 4 cylinders use 4.0 radiator supports with an adapter for the 4 cylinder radiator...so, if you want to do the swap, you just need the interior and engine bay wiring harness, and all engine bay accessories including frame-side motor mounts. you will also need to swap out your fuel pump (the xj one can be put on the MJ sender) and perhaps the upper fuel lines Link to comment Share on other sites More sharing options...
mvusse Posted June 30, 2008 Share Posted June 30, 2008 The transmission may need to be swapped alongside the engine. If your 2.5 has an AX 5, there is no way to bolt that onto a 4.0 that I know of, nor would it last if that were possible. Link to comment Share on other sites More sharing options...
FLASHBACK Posted June 30, 2008 Author Share Posted June 30, 2008 YA IT IS AN 88 AND IF WAS TO DO THE SWAP I WOULD SWAP MOTOR TRANYY TCASE AND ALL THAT JAZZ. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted June 30, 2008 Share Posted June 30, 2008 YA IT IS AN 88 AND IF WAS TO DO THE SWAP I WOULD SWAP MOTOR TRANYY TCASE AND ALL THAT JAZZ. To take a line from your signature.... Simon says turn off caps lock :brows: Link to comment Share on other sites More sharing options...
mvusse Posted June 30, 2008 Share Posted June 30, 2008 YA IT IS AN 88 AND IF WAS TO DO THE SWAP I WOULD SWAP MOTOR TRANYY TCASE AND ALL THAT JAZZ. http://comancheclub.com/forums/viewtopic.php?t=10658 Link to comment Share on other sites More sharing options...
FLASHBACK Posted June 30, 2008 Author Share Posted June 30, 2008 ya i know I'm sorry work computer is always on caps Link to comment Share on other sites More sharing options...
JeepcoMJ Posted June 30, 2008 Share Posted June 30, 2008 i assumed he knows about the transmission issues since he said he'd just buy a parts xj and swap it all over. only thing you should need made would be the rear driveshaft. Link to comment Share on other sites More sharing options...
FLASHBACK Posted June 30, 2008 Author Share Posted June 30, 2008 and for that i could also find a long bed 4x4 mj and just use that drive shaft correct? or have mine shortend since i have a 2wd Link to comment Share on other sites More sharing options...
JeepcoMJ Posted June 30, 2008 Share Posted June 30, 2008 and for that i could also find a long bed 4x4 mj and just use that drive shaft correct? or have mine shortend since i have a 2wd do you have a longbed? if so, then yes just get a longbed 4wd driveshaft from a longbed which has the same motor as you are putting in. also, a 2wd shortbed rear driveshaft may work in the back of a 4wd longbed...but there are many variables there...I'm using a 2wd shortbed 4.0 auto dana 44 equipped rear shaft in my lwb 2.8 4x4 5 speed which now has a dana 44...no problems as of yet. Link to comment Share on other sites More sharing options...
FLASHBACK Posted June 30, 2008 Author Share Posted June 30, 2008 ok sounds good man i will worry about the drive shaft when i figure out what the hell I'm doing. Thanks for your input Travis Link to comment Share on other sites More sharing options...
JeepcoMJ Posted July 1, 2008 Share Posted July 1, 2008 ok sounds good man i will worry about the drive shaft when i figure out what the hell I'm doing.Thanks for your input Travis you have a longbed or a shortbed? Link to comment Share on other sites More sharing options...
FLASHBACK Posted July 1, 2008 Author Share Posted July 1, 2008 oh sorry i have a long bed Link to comment Share on other sites More sharing options...
JeepcoMJ Posted July 1, 2008 Share Posted July 1, 2008 oh sorry i have a long bed lol. ok, if you are putting an automatic transmission (aw4) and 4.0 in it, then a swb driveshaft may work...depending on what rear axle you have. Link to comment Share on other sites More sharing options...
FLASHBACK Posted July 2, 2008 Author Share Posted July 2, 2008 problem solved, i found an ax-5 and a 231 from a 97 tj so looks like I'm staying with a 4cyl. Probably better off that way, gas prices are going crazy up here. Link to comment Share on other sites More sharing options...
Dave88 Posted July 2, 2008 Share Posted July 2, 2008 Everywhere* Link to comment Share on other sites More sharing options...
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