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Unread 06-01-2013, 06:25 PM   #1
dcast
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inline 6 jk?

so i am getting ready to renew my man card - after having lost my jeep to chrysler's misfortunes, getting a truck and trading that in for a minivan to save money - and have a quick question regarding the jks. I would prefer an 05 unlimited, but see that those are hard to come by these days, and also, the jk would seat my 3 children on the back bench. however, i do not like the direction jeep went in with the engine choice. i love the reliability of the inline 6.

has anyone ever seen or heard of dropping ol' trusty in a new body style? or is there even room? or should i just keep looking around for an 05?



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Unread 06-01-2013, 07:20 PM   #2
nwbronco
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It'd be more than just dropping in the 4.0L. Transmission, t-case, all of the drive train would have to be custom. Cross member too. And then there is the CANBUS in the JKs that would not even know what to do with your new drivetrain. Save your heartache, find and LJ.

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Unread 06-01-2013, 08:14 PM   #3
tjkj2002
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Originally Posted by nwbronco View Post
It'd be more than just dropping in the 4.0L. Transmission, t-case, all of the drive train would have to be custom. Cross member too. And then there is the CANBUS in the JKs that would not even know what to do with your new drivetrain. Save your heartache, find and LJ.

Bob K.
That and it would be illegal as the 4slow will not pass '07+ emissions.
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Unread 06-01-2013, 10:03 PM   #4
ronjenx
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I had the 4.0 in my XJ for 14 years, and in my MJ for 6 or 7 years.
Initially, I didn't like giving up the inline 6, either.
I have found over the past five years the 3.8 in my JK turns the transmission's input shaft every bit as reliably as the 4.0 did in the XJ/MJ.

Any difference between the two wouldn't be worth the swap, even if it could be done.
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Unread 06-02-2013, 04:12 PM   #5
nwbronco
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Originally Posted by tjkj2002 View Post
That and it would be illegal as the 4slow will not pass '07+ emissions.
There is that, of course. Unless you live in an area where there is no emissions testing.


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Unread 06-02-2013, 09:39 PM   #6
AlbertaJeeper
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Originally Posted by nwbronco View Post

There is that, of course. Unless you live in an area where there is no emissions testing.

Bob K.
Exactly! I couldn't imagine living somewhere where you had to get things tested and inspected all the time. Or have a front licence plate for that matter!
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Unread 06-03-2013, 08:34 AM   #7
Godholio
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Exactly! I couldn't imagine living somewhere where you had to get things tested and inspected all the time. Or have a front licence plate for that matter!
It sucks. I had to put a front plate on mine this year after moving. Not happy about it, either.
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Unread 06-03-2013, 09:08 AM   #8
OregonVette
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Why on earth would you do this?

"ol trusty"?? The inline 6 is just every bit as reliable as the 3.8 engine. There are a trillion of these engines all over planet earth.

If the 3.8 is so darn heinous, just put in something which Is actually a pretty convenient kit swap with the Hemi. MUCH more "big boy" engine than any 6 cylinder. Probably cost a heck of a lot less too.


This thread reeks of tj trolling. We've kinda seen enough of that over the last SEVEN YEARS.

Need more space? Keep your minivan. You're a dad. Man up.
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Unread 06-03-2013, 12:07 PM   #9
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Just get a 2012 and stop *****ing. The 3.6 with proper gears will make a 4.0 cry like a *****
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Unread 06-03-2013, 07:24 PM   #10
tjkj2002
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Originally Posted by nwbronco View Post
There is that, of course. Unless you live in an area where there is no emissions testing.


Bob K.
Still is illegal and when you sell it you can still be liable when the new owner takes it to a place that requires emission tests.
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Unread 06-03-2013, 07:54 PM   #11
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Originally Posted by AlbertaJeeper

Exactly! I couldn't imagine living somewhere where you had to get things tested and inspected all the time. Or have a front licence plate for that matter!
It's worth it to live in Colorado and wheel trails that most have wet dreams about.
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Unread 06-03-2013, 07:57 PM   #12
vgibson80
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I find the 3.8 in the JK Unlimited to be just fine. Fits my kids, not terrible on gas for the commute, and yes, living in say, NJ sucks for front plates and emissions...
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Unread 06-03-2013, 08:00 PM   #13
nwbronco
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Still is illegal and when you sell it you can still be liable when the new owner takes it to a place that requires emission tests.
I have friends in 3 states with CJs/TJs with 5.2 Dodge, 5.7 GM, and 5.0 Ford motors. The biggest gripe from the areas that care is the engine needs to be from the same MY or newer.

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Unread 06-03-2013, 08:35 PM   #14
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It's worth it to live in Colorado and wheel trails that most have wet dreams about.
Haha ya not really my biggest benefit for living here! As much as I love some places down south here there would have to be something really good to draw me from the Great White North!
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Unread 06-03-2013, 10:28 PM   #15
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Heres the billionth thread on this. The only reason people love the 4.0 is the reliability. The 3.8 and the 3.6 haven't been around long enough to prove themselves. It would cost sooo much money to do it and you would end up with a nightmare of electrical. Would be easier to put a HEMI in.
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