New to this forum, have some questions and Im hoping you can help because my main area's of expertise are C-130's and Honda's... So anyways, Before my buddy left for the desert he gave me his 91 Cherokee Laredo 4.O inline 6 5 speed (nice guy) It has some mods like lift, tires, etc. It also has a shortblock he dropped in there about 4 years ago, so its not very old with probably only 40k miles on it. And im looking for another jeep that i can throw on the road to haul my family around in and have something for bad weather. I would throw the 91 on the road but the body is pretty beat along with the interior. My plan is to buy a jeep in good shape body wise and swap in the newer motor from my buddies jeep into the one i will buy because of low miles and all. My question is what other jeep models can i swap this into? Im leaning towards something in between 95-98 body style 4.0 laredo but im not sure if that will work. Plus I dont know if a motor off of a manual setup (my buddies old jeep) will bolt up to the auto tranny if thats what i end up buying. Your help/experience in this matter would be very appreciated. Thanks

 

NM. moved as i replyed. lol.

 

Welcome. Staying in the 91 to 96 years would be simpler, but up through 99, and maybe later, can be done.

 

Would the problem with swapping into a 97-99 be OBD issues/compatibility?. Im assuming that a 4.0 from 91 would have all the same engine mount styles/plugs/bolt patterns as a 98 with a 4.0 but I am probably wrong... Just thinking that the 1990-9 4.0 straight 6's would generally be the same.

 

Think of it as swapping a longblock in. You use all your sensors, dizzy, manifolds and flywheel.

 

Guess the 91 OBD I has the HO Head with the improved Intake. If you found something 91>96, more sensors might swap. Then OBD II to 01.

 

Yeah, this is my first motor swap with a jeep. I guess its safe to say that i could atleast mount the donor motor in the newer jeep and then troubleshoot the rest (sensors,etc)as I go along. First I have to find a replacement jeep haha. But can I bolt up a motor that came off of a manual tranny onto an auto tranny?

 

Yes, the manual to auto deal is no biggy. I have done the HO into Renix swap twice with no issues. Post up any questions.

 

So easy even an A&P Mechanic can do it, j/k.... Like cruiser said 91-95 is a plug-n-play, but the 91 can go into a 96+, you would have to swap the sensors, and the power steering bracket from the newer model to the older engine. I put a '93 engine in a '99 body. It was really easy.

 

Haha thanks... I would think it would apply to cars in some way haha. But you guys have been a huge help. I just didn't want to make the mistake of assuming, and then mid swap find out essential bolt patterns didn't match up. I will probably be back on here when I actually start the swap. Got way more help here than I thought I would. Thanks again gents.. Cherokee Forum FTW

 

Sounds like you are good. Just don't forget, I think cruiser mentioned the flywheel to be doubly sure there isn't an issue with your CPS, and if you cross to auto be sure pilot/no pilot/ torque converter business is configured right before you bolt it up. (Idk if the pilot bearing needs to be removed from a manual to accommodate an automatic, or not).

Oh and, you do know...you can go back as well, to 87 if you happened to find a body you liked.