Originally Posted by RobSheaTJ
Most of my mods up to this point have been pretty tame, the biggest one being a 3" lift. So I'm a bit of a newbie.
I love my Jeep but hate it's engine. Putting a 4.0 I6 in it would be amazing. I've been trying to do some research on it and thought it would be one of those threads that gets dredged up every few weeks or so but can't seem to find a single one.
Does anyone have any experience with this swap? Is it the most compatible engine in regards to transfer case and transmission issues? What other sorts of issues can I expect? Any other suggestions would be very much appreciated.
It's really not that hard. But depending on your local laws it maybe a littler harder finding a 04-06 swap to put back in the same year or new motor.
Your PCM and dash is PCI so you want a motor from a 01-06 Wrangler. It'll make it easier on you since the harness and pcm will work with your gauges. You'll have to move your motor mounts. If I was you I'd find a donor vehicle so all your parts are there.
You maybe able to get away with using your engine harness, comparing it's pinouts to those of the PCM for the new motor and adding the extra injectors that you need.
Although if you are going to go for this much work just for the 4.0 most will say including me to go bigger than a 4.0. They are great motors but leave a lot to be desired
Also you'll want to swap in the trans from the 4.0 and if you can grab the tcase, it'll help in the long run.
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01 TJ, HP 30/Locked, dana44/locked, 4.88's, 4in ProComp Springs, JKS 1.25 bl, JKS Trackbar, Currie Arms, RS9000XL shocks, 35x12.50 MTR Kevlars, 15x8 Soft 8's, Skyjacker Discos, Brown Dog MML, SYE, Smittybilt Rear Bumper/Tire Carrier, Currie Steering, Warn x8000i
03 Jeep TJ, 1 Ton Project. 79 Dana 60/dana 70, 5.9L 360, hiline tube fenders