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Unread 06-09-2014, 03:59 PM   #1
fast540
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4.7 to 4.0 swap

What's involved in swapping my v8 for the i6

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Unread 06-09-2014, 04:04 PM   #2
Ah673000
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Don't do it.... Done.
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Unread 06-09-2014, 04:14 PM   #3
rcwj04
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Well you gotta find someone to buy your current jeep and then with the money you made from that you buy one with a straight 6. It's to much money and work to actually do a swap, everything needs to be changed
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Unread 06-09-2014, 05:12 PM   #4
fast540
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Quote:
Originally Posted by rcwj04
Well you gotta find someone to buy your current jeep and then with the money you made from that you buy one with a straight 6. It's to much money and work to actually do a swap, everything needs to be changed
by everything you mean what? The trans works cooling systems the same motor mounts don't concern me. So engine harness ECM. I don't know that why I'm asking for the tech involved. Not to sound rude but the opinions involved in which motor is better or sell your rig buy a new one doesn't apply. It's my trail rig and my buddy has a built wj i6 which would free up all sorts of room for me. For street/dd I have a v8 limited that I love but for the rocks the power difference doesn't matter but the space would be nice
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Unread 06-09-2014, 05:35 PM   #5
Kalel
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The Transmissions are not the same, the ECM needs to be replaced. The wiring harness needs to be changed, motor mounts might be different, but I am not sure. Honestly I would think selling yours and buying an I6 would be the most cost effective and way less time consuming.
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Unread 06-09-2014, 05:46 PM   #6
rcwj04
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By all means I wasn't trying to be rude or say which motor is better, sorry if I can l came off that way, my sense of humor doesn't translate to text very well haha. I haven't heard of anyone using the 545fre with the 4.0 so I'm pretty sure that would have to be changed. All the wiring and computers would a major pain, but if your up for it have at it haha
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You forget that most members here don't own a crystal ball to tell you exactly what your problem is, specially with bad pictures that don't say/show much of anything... -Jacko84

Just a 19 year old kid with a Jeep, and broke because of it, and loving every moment.
---------------------------------------------------------------
2004 WJ Laredo 4.0 116k
2" BDS coils & Bilstein 5100's | Addco rear swaybar with energy bushings |
K&N FIPK | glasspack | plasti-dipped badges | 17" moabs | HID's, 245/65/17 Cooper Discover AT3 | Rola rack | Fawkes stand alone shackle tabs | Bed lined interior (what a pain that was)
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Unread 06-09-2014, 05:57 PM   #7
narnwv
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You need engine, trans, driveshafts, all wiring, computers, exhaust...

Essentially the only thing that you keep is your axles and body.
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Unread 06-09-2014, 05:58 PM   #8
fast540
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Quote:
Originally Posted by rcwj04
By all means I wasn't trying to be rude or say which motor is better, sorry if I can l came off that way, my sense of humor doesn't translate to text very well haha. I haven't heard of anyone using the 545fre with the 4.0 so I'm pretty sure that would have to be changed. All the wiring and computers would a major pain, but if your up for it have at it haha
gcjeeping if I'm not mistaken is running the v8 trans behind his 6. I have access to a new built wj 4.0 and my trail rig has too many hrs in it to "start over" in a new rig. If I could pull the swap for a few g it'd be cool so I'm tryin to find out exactly what I'd need for the motor swap. Harness ECM bcm ect
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Unread 06-09-2014, 06:00 PM   #9
narnwv
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No, he has the v8 tcase behind his. (very easy to do)
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Unread 06-09-2014, 06:06 PM   #10
fast540
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Quote:
Originally Posted by narnwv
You need engine, trans, driveshafts, all wiring, computers, exhaust... Essentially the only thing that you keep is your axles and body.
oooo does the i6 move the tc back?
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Unread 06-09-2014, 06:15 PM   #11
narnwv
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Yes
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Unread 06-09-2014, 06:22 PM   #12
fast540
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That might be the deal breaker. The harness and stuff I have but chopping up my drivelines would suck
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Unread 06-09-2014, 08:54 PM   #13
Wheelin98TJ
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Driveshaft length is a minor and easy obstacle when talking about a motor swap.

The 545RFE will not bolt up to an I6.

Doing this swap to free up space under the hood seems very silly. Did I maybe misunderstand the intentions behind this idea?
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Unread 06-09-2014, 09:10 PM   #14
gcjeeping
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Rad is different too.
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Unread 06-09-2014, 10:47 PM   #15
fast540
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Quote:
Originally Posted by Wheelin98TJ
Driveshaft length is a minor and easy obstacle when talking about a motor swap. The 545RFE will not bolt up to an I6. Doing this swap to free up space under the hood seems very silly. Did I maybe misunderstand the intentions behind this idea?
the trans issue and driveshafts is the deal breaker I had a line on a bada## built wj 4.0 cheap with harness and all the bits but I just had custom beefy dom shafts built plus trans and tc are new ,well tc is new to me and a brand new griffin aluminum rad so I don't wanna dump those parts. Thanks for the input guys
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