Hold the phone...you did say "DIESEL," what engine(s) are you using or looking at?

 

What do you have right now? Does the 3.6 include the transmission (I hope so b/c the 5.7 cant use a stock tranny)?
Pretty much anything can be made to fit with the right amount of work
Does your friend like the 5.7 better than the SC 3.6?

 

Change out the seats. Do a dash swap with steering wheel and you basically have a 12+ Jeep. I think you did good way cheaper than buying a new JKU.

 

Actually a few. For years diesels did not make sense in a JK. The 4BT belongs in a bus and there were very few USEPA certified production North American light truck diesels available. Emissions compliance is required, the "for off road use only" is a cop out IMO.

The early Mercedes Bluetec GC was interesting but rare and expensive. The VM 2.8 CRD is weak and not compliant. The 3.0 VM is a candidate but very expensive, close to $20k just for a new power train. Were working with Advance on the small Cummings but it will only be compliant in early Jeeps .

Most promising now is the baby Duramax in the new Colorado. Light, powerful and most importantly emissions compliant. Also being a GM product it is designed and manufactured in the US, should be available in quantity, easily serviceable and will run the best transmissions.

My goal was to get one running by the end of the year but with the Gen V taking up our time it's pushed back a bit.

 

The diesels are made in Thailand. Tranny assembled in Mexico. Truck assembled in Missouri.

 

Love the idea of a Duramax, albeit a "baby"!

 

Hey just to let people know, a friend and I did a 3.6 swap also!

Original jeep was a 2007 JKUR, 3.8L/42RLE/NV241OR.

Swapped a 2012 3.6L/NAG1/NV241

We needed the following parts :

3.6L Pentastar, his PCM and TCM modules
NAG1 Transmission (not sure if we replaced the cross member, its been a while)
2012+ shifter assembly and complete console
NV241 transfer case (you will need a 2015+ procal or other tuner to reprogram the TC ratio change, as we went from a rubi 4:1 to a sport 2.72:1)
Engine Bay Wiring harness
Chassis wiring harness
Complete exhaust
Power steering pressure hose
Vaccum pump
brake booster vaccum sensor
Fuel tank pressure sensor (it comes with the vent tube connected to the filler neck if I recall correctly)
2012+ ABS module (the NAG1 take the wheel speed sensors signal as it doesn't have any internal or external speed sensors)
2012+ AC lines can be used but has to be modified to fit the expansion valve on the firewall.
you will need to keep the cooling fan high speed relay of the original wiring or it won't work, unless you have the 2012+ fan.

What you need to know :

Its a LOT of work to fit both generation of harnesses together. I was a tech in a chrysler dealer at the time we did the swap, and it took me over 50 hours to do it with both year diagrams.
Fog and Parking/turn signals pin outs are inverted in the tipm
ABS/trac control Dynamic sensor pin out is different
front VS rear Windshield washer pump polarity is inverted also
rear window switch in the back of the console, pin out is different.

What you need to do once everything is connected :
Program your ORIGINAL key code in your new pcm so the SKIM recognize the keys
thats it


what you DON'T need to replace or do :

keys
WCM module
TIPM
cluster
cooling fan
You don't need to program your VIN in the pcm. if you do you will not be able to access the TCM in the topology with the Witech scan tool, as the 2007-2011 generation has a built-in TCM inside the PCM.


We replaced the TC because the old rubi that came with the 42RLE have a different input shaft than the NAG1.

I believe we are the very first to do a 3.6 swap with an automatic transmission. I've been searching the web for a longtime for anybody who did it but found nothing. We are pioneers! And it works great! If you ever concider doing it, Do yourself a favor and pick the 2012-2014 generation as the pcm's are unlocked and easier to work in. The fun thing is that the auto stick works, and the cluster display the selected speed just like the newer jk's.

 

Great news holeshot! I was wondering if you succeeded. The auto swap is a bit more involved. Mine is still running strong, but I have the traction control permanently disabled as a result of the swap. You mentioned the traction control Dynamic sensor pin out is different. Any way you could elaborate how you made those compatible? I still havent figured that one out. I am also getting a throttle error (but it may be totally unrelated.. loose wire or bad ground).
Great job!

 

I believe the throttle error (if it doesn't throw a code) is related to the trac control light on.

And to be honnest, there's still a few thing I have to work on. The jeep has been parked since last fall as it took us some time to figure out the ABS module thing. If you don't replace it for the newer version, it won't transmit the wheel speed in the CAN bus to the TCM, as a result, the TCM put the transmission into limp home mode and stays in 3rd gear. Same result if you put a different TC with a different ratio on the low gear, you have to reprogram that, the dealer can't do it.

My friend has replaced the ABS module last week and been using it since. He dropped it off at my place this morning so gotta work on that when I get the chance.

As for the dynamic sensor, I have to talk to my friend when he'll get a chance to answer (because he works in the weekend), I don't remember if we replaced the wiring in the console that goes to the sensor, or if its the original that sits there. IF its the 2012 wiring, the plug pin out is different. I will attach images of the diagrams. pay attention to the sensor pin out.

see for yourself, on top its the 2007 diagram. on the left highlighted is the ABS module, and on the right you see the sensor, highlighted.


and below is the 2012+




Another issues that I still have to work on is the cooling fan wiring. We trashed the old harness a while ago so I have to redo all that with a new high speed relay. its winter here so he can go on the road with no issue.

I also figured out the washer pump this week, as the jeep have been parked for a long time we discovered this one a few days ago. Maybe its my mistake though. I might inverted the wires during the tipm connector adaptation.

 

but you really have to pay attention to details in the diagram, and also the quality of it.. above are non-OEM diagrams, and the one here is OEM. What happened here is that on the non-OEM diagram there's a connector missing, the C106 that you can see on the one below.

The sensor circuit originaly goes through the C106 but is modified to go through the I302, so maybe its there that I made the mistake