JK-8 going LS - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 131 Old 03-21-2017, 09:43 AM Thread Starter
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JK-8 going LS

My wife and I had talked about a Hemi swap to keep the Mopar these for a couple years knowing this 3.8 would give up sooner than later. Well, it was definitely sooner. Just as we were closing on the new house with a shop the 3.8 spun a cam bearing. When I started running into road blocks with the Hemi (lack of kit availability and seeing the issues other were having) I stopped and opened up to the possibility of the LS. Thinking I wanted the GEN V 5.3 but after talking to both Jon and Robbie, they talked me into the GEN IV 6.0 LS2 and 6L80E.

6.0L from a 2013 Sierrra HD 4wd with 30k miles

6L80E from a 2013 Chevy 1500 2wd with 33k miles

241J from a 2015 Manual trans JK with 50k miles


Yes, that is my 2 post lift sitting idle. Plans for the house called out 4" concrete in the RV bay but when drilled it was only 2.5". I will need to pour footings but the cure time puts me will into our Moab trip so I decided to perform the swap with body on frame. Sucks!

Transmission modified

Transfer case input shaft replaced
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post #2 of 131 Old 03-21-2017, 09:44 AM Thread Starter
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It's so little!
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post #3 of 131 Old 03-21-2017, 09:45 AM Thread Starter
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Gotta love those RPM Extreme headers!
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post #4 of 131 Old 03-21-2017, 09:52 AM
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Originally Posted by Rubi-8 View Post
Gotta love those RPM Extreme headers!
that is sexy as hell

TC
Crawling For Reid March 17, 2018 Adventure OffRoad Park


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post #5 of 131 Old 03-21-2017, 10:05 AM
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So did you go with an RPM kit as well?


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post #6 of 131 Old 03-21-2017, 10:14 AM
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Right on man! What size exhaust pipe? Go check out my thread if you want, I've got the same headers.

I also spy that ARP header studs, Sweet piece of kit right?

I have found ZERO instances where I was like "man I really wish I could have taken the body off". I am sure for the pros it makes it easier and faster but I was glad it was on when I was fitting everything so I could monitor fitment on the fly.

Last edited by Dkjeep; 03-21-2017 at 10:18 AM.
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post #7 of 131 Old 03-21-2017, 11:10 AM Thread Starter
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So did you go with an RPM kit as well?
I did! I talked to both Jon and Robbie at length and cannot say anything bad about either. RPM was able to meet my short deadline of getting to Moab in May so I went that direction.

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Right on man! What size exhaust pipe? Go check out my thread if you want, I've got the same headers.

I also spy that ARP header studs, Sweet piece of kit right?

I have found ZERO instances where I was like "man I really wish I could have taken the body off". I am sure for the pros it makes it easier and faster but I was glad it was on when I was fitting everything so I could monitor fitment on the fly.
Killer build and I will read your thread a few more times before I finish. 2.5" exhaust is the plan since I have the Magnaflow rock crawler already but that may change after talking to a guy who does all the local hot rods and race cars.

Love those ARP header studs! The price tag only hurts until they are installed. I will never use anything else in the future.

Thanks for the confidence of body on; this is how we use to do it in the old days and I think it will go smooth but watching all the MoTech videos and seeing how clean everything can be I wanted to do body off so I could clean and paint every inch while it was apart. I still will but it will take longer.


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post #8 of 131 Old 03-21-2017, 07:58 PM
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post #9 of 131 Old 03-22-2017, 04:52 AM
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Sweet! Another LS Swap thread! I'm goin with similar specs for mine and can't wait to get started. Maybe next week!

2012 6.0 L96 28k miles
2011 6L80 24k Miles

Oh...started my 1 ton swap too. I want those under the rig before I start the LS Swap. Hence the delay in pulling the 3.8 and getting started. I will start a thread as soon as I get going.

SuMo
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2007 Black JKU, 4" Terraflex, 37" Nitto Muds, MagnaFlo, WildBoar slant back top, LS SWAP COMING SOON
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post #10 of 131 Old 03-22-2017, 05:39 AM
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that is sexy as hell
holy crap ^X2 . That is awesome sexy!
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post #11 of 131 Old 03-22-2017, 06:33 AM Thread Starter
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Sweet! Another LS Swap thread! I'm goin with similar specs for mine and can't wait to get started. Maybe next week!

2012 6.0 L96 28k miles
2011 6L80 24k Miles

Oh...started my 1 ton swap too. I want those under the rig before I start the LS Swap. Hence the delay in pulling the 3.8 and getting started. I will start a thread as soon as I get going.

SuMo
My dana 60s are sitting in the corner of the shop in time out. Wife threatened to cut up my credit card and change the password on Amazon if I didn't sell my Rubi axles first.


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post #12 of 131 Old 03-22-2017, 06:49 AM
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Very nice, you'll love the 6.0. Makes the Jeep feel like it should.
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post #13 of 131 Old 03-22-2017, 09:28 AM
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Very nice, you'll love the 6.0. Makes the Jeep feel like it should.
X2 I cant say enough good things about my 6.0! You will love it!
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08 JKU 6.0 LC8 6L80 Atlas 2 37" ridge grapplers on vapor pro 2 beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff
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post #14 of 131 Old 03-22-2017, 02:37 PM
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Man If I had a do over I would have done a 6.0 as well, good choice
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post #15 of 131 Old 03-22-2017, 02:55 PM
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Man If I had a do over I would have done a 6.0 as well, good choice
Doubt it!

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post #16 of 131 Old 03-22-2017, 04:23 PM
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I just noticed your A/C bracket on the low passenger side. I don't believe you are going to be able to keep that one because of clearance issues.
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post #17 of 131 Old 03-22-2017, 04:24 PM
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Man If I had a do over I would have done a 6.0 as well, good choice
Really? with that bad ass supercharged monster?
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post #18 of 131 Old 03-22-2017, 05:09 PM
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Yea I would have had it done in 2-3 months! I bet I haven't put 300 miles on it since it's been home, I had my corvette catch fire from mods and since then I've stayed in a diesel truck with door handles for my own piece of mind. I have trust issues with gas powered items since
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post #19 of 131 Old 03-22-2017, 09:49 PM
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I just noticed your A/C bracket on the low passenger side. I don't believe you are going to be able to keep that one because of clearance issues.
The AC will work fine there as long as you don't have a lowered jeep or no bump stops.

Just verify after the build that you have enough bump stop to keep the AC compressor from making close friends with the upper control arm mount on the axle.


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post #20 of 131 Old 03-23-2017, 06:44 AM Thread Starter
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Originally Posted by 0lllllll0 RPMEXTREME View Post
The AC will work fine there as long as you don't have a lowered jeep or no bump stops.

Just verify after the build that you have enough bump stop to keep the AC compressor from making close friends with the upper control arm mount on the axle.
I did measure and it looked fine with the engine on the mounts (but I did not have the a/c on yet).

Yes I have bump stops and will have a 3-link after this is done. Thanks Jon, I will make sure to watch that upper mount closely.


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post #21 of 131 Old 03-23-2017, 01:58 PM
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I have my a/c in that location. I knew I would have to increase my bumpstops so there would not be any contact with that control bar mount and the a/c plus I wanted to install some synergy 4.5" springs in the front to help with the LS weight and nose sag. So with the springs out I lifted the jeep up with axle against the bumpstops then added 1/2" to 3/4" to the amount I would need to clear and so far that has worked, ended up with an additional inch of bumpstop with what was already there.

2007 JKU X, 6.0 ls and 6L80e with a diy kit from RpmExtreme, 4.10, 4" ProComp Stage 1 lift, AEV drop brackets, 325/65R18 Nitto Terra Grapplers, Eagle Offroad Alloys 18"x10"
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post #22 of 131 Old 03-23-2017, 01:59 PM Thread Starter
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I appreciate the into 4wheels4life! We shall see what happens...


I have not been feeling well this week so progress has been slow. Hopefully I get my mojo back and get a lot done this weekend.


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post #23 of 131 Old 04-02-2017, 05:03 PM
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you get anymore done?

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post #24 of 131 Old 04-03-2017, 06:24 AM Thread Starter
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Rough weekend but got a few things done. My ADD kicked in and decided to paint the entire frame, undercoat the body, armor up the axles and install my front 3-link while everything was apart. Pictures to follow shortly.


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post #25 of 131 Old 04-04-2017, 06:55 AM Thread Starter
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LS in here new home
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