Anyone know the differences between the 2005 and 2006 gas models (3.7L V6)???
May help figure out where I can expect issues with installing the '06 3.7L into the '05 CRD.

'06's have ESP while '05's do not so ABS is standard and integrated part of the engine management.

So do you think I should just move forward with the entire wiring harness swap?
Or do you think there is any chance of the body harness from the dash back being the same from '05 to '06?

I wonder if I will be able to reuse the factory trailer wiring (7-pin for use with brakes) from the 2005 with the 2006 harness? I need to try looking up part numbers for the different harnesses to see which are the same from '05 to '06 and from the 3.7L to the 2.8L. Not sure where to look it up but that may be the only way other than pulling both harnesses and comparing wire for wire.

If I ever sell my '05 KJ after this swap someone is going to be really confused if they have to work on it.

Thanks for the info on the ABS and ESP.

I also forgot they went to Can Bus in '06 so you might want to think total harness swap.

Thats a major change there.
I'm just going to commit to changing the entire harness over. Too bad I couldn't have found a wrecked '05 instead of an '06. Would have been a lot less work.
You wouldn't happen to have any info on that extra dome light on the '05 vs the '06 would you? Still can't find any info as to why the '06 doesn't have it or if it was maybe an option?

Thanks.

2005 KJ

2006 KJ

I am tearing the '05 CRD apart this weekend. I believe I have everything needed for swapping in the '06 3.7L (gasser) drivetrain. Hoping to reuse the 2005's NP242 (NV242) but not sure it will mate up to the wimpy 42RLE of the gasser. Or if the driveshafts from the '06 would still work out if I did use the NP242 in place of the NP231 on the gasser.

I am loving my '91 YJ more and more everyday...

I couldn't resist taking the dying diesel for one last run down my street. I know I probably destroyed the new cams, lifter, rockers, and who knows what else...but at this point I really don't care. https://www.youtube.com/watch?v=aSbNfIUESjE
At least it shows that the 545RFE does function if I end up not rebuilding the 2.8L and parting all that stuff out.

I am planning on tearing the '06 apart next weekend and hope to have the '05 back on the road with its new/used drivetrain in a couple weeks.


(New Process Gear/New Venture Gear)

I am sure its been discussed here before but I am going to ask anyway...

Any differences between the transfer case from a 3.7L KJ and one from a CRD KJ?
Are the input shaft length and spline count the same between the two? (NP231)

Grab a note pad, a pencil, and a 6-pack and sit down with the parts book and start comparing part numbers. When you find differences, start cross referencing them with the FSM. I know one of them has some issue with something or another, I downloaded both just in case.

as a teaser....

ED0=All 2.2,2.4,2.5,L 4Cylinder Gas Engines
EK0=All 3.7L Gas Engines
EN0=All 4/5 Cylinber Turbo Diesel Engines

52853123AD J, U TRANSFER CASE, NP242

J = JEEP - 4WD
U = JEEP - 4WD (RHD)

_________________
-Rich
It must be air in the fuel!

You'll need to change your VIN tags or the resultant project will never pass state inspection - VIN selects correct automated testing routines for gasoline or Diesel emissions - no matchee, no tickee............................

_________________
'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go

Okay, so I have the 2005 CRD torn apart with the exception of the brake components (ABS) and the rear axle/suspension.
Already removed the CRD engine cradle and installed the '02 3.7L engine cradle that I picked up for $40 at the local U-Pull a while back. I ended up leaving the CRD front coils in place for now. I am sure they will be a bit stiff for the 3.7L but figured I would give them a try. If it makes the front sit a little high I can always install those early '02 rear coils to maybe level it some?
Haven't begun tearing apart the 2006 yet. Not really looking forward to all the '06 ESP stuff controlling way too many things. Wish the '05 regular ABS system could work with the '06 computer and wiring. I would be okay if it would work and only result in a light on the dash. Should have the '06 torn apart next weekend.
So far the tear down has been easy and the '05 CRD's complete interior is now taking up space in an upstairs bedroom until its ready to go back in.
Still haven't been able to find any info as to whether or not the '05 factory trailer brake 7-pin harness will work with the '06 wiring. I hope so since I don't want to buy anymore components if I can help it.

No, felony.

You need a state inspection to convert from gas to diesel and vice versa. It will be logged with emissions testing facilities and pass for the engine specified.

And diesels 06 and older are not subject to federal emissions standards

Diesel passenger vehicles and 1/2-ton to 1-ton SUV's and pickup trucks back to OBD2, ~ 1996, are subject to Federal emissions standards, and are automatically tested by oem-registered VIN, providing that the state Department of Transportation is conformant to Federal emissions mandates - problem arises when the gasoline VIN is scanned and the Diesel engine cannot respond to IAC idle air control, primary and secondary O2 response which has to do with ignition timing and EGR vs rpm, etc, to name a few - Federal also prohibits installation of earlier non-compliant Diesel engine in Federally-compliant vehicle chassis - conversions have become very sticky\messy, almost impossible - I can think of several vehicles which would be better served with a suitable ECM-controlled turbo-Diesel installation...........................

_________________
'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go

The county where I live in North Carolina only does the Safety inspection on the '05 CRD Liberty (same as required for OBD-1 in NC) and does not require the emissions test though they do perform a visual inspection to make sure all factory emissions components are in place.
My 2000 Ford E150 along with the '06 Jeep Liberty 3.7L (donor) both get the Safety inspection and the Emissions check.
I am not sure what is going to happen in December when the '05 KJ is due for inspection again and rolls in there with a registration saying that only the Safety inspection is required and then they open the hood and find the 3.7L gasser.
Can't swap the '06 vin to the '05 body since that is illegal here. If I were swapping a body or frame (if it had one) then yes I could legally swap the vin to the one that goes with the frame or the body but not for a drivetrain swap.
I am keeping the clear '06 KJ (donor) title and all vin plates like I do with any other Jeep that I part out just to cover my a** in the future. Lets say I sell the '06 body and it gets completely rebuilt and ends up getting stolen at some point...I then take the '05 in for service at a dealer (never going to do that again) or in for inspection and the vin they pull from the computer flags it as being from a stolen vehicle. I am sure that would be the extremely unlikely worst case scenario but I just like to keep myself out of possible situations like that.
I am going to sell the '06 KJ shell for parts only so maybe someone can use the roof, quarters, and whatever else they need to rebuild a rolled or rear-ended KJ.

Almost forgot the mileage difference is going to be a big red flag when it gets inspected since the '06 has less miles than the '05 but I am pretty sure I can put 2500 miles on the 3.7L odometer before inspection is due.

Ok - in any case, it's always best to check with your local DOT prior to preceeding, lest you wind up with a 4-wheel flower pot - or, you could just paint it green, and hide it in the grass..................................

_________________
'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go