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Old 05-15-2017, 10:02 AM
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JKU swap?

Hey guys not sure if this is the right section or not. If not sorry for the post, maybe someone can point me in the right direction.

Ive been thinking about a LS2 swap in my 2008 JKU. I found a decent deal on the motor. The thing I cant seem to find is info about a 6sp manual trans. My JKU is a manual and I want to make sure others are doing this swap with a manual.

Thanks guys.

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Old 05-15-2017, 10:19 AM   #2
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are you referring to a new manual trans or the existing one in your jeep? I wouldn't expect the stock wrangler manual to live behind an LS motor for too long.

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Old 05-15-2017, 10:32 AM
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Quote:
Originally Posted by slomaro3.4 View Post
are you referring to a new manual trans or the existing one in your jeep? I wouldn't expect the stock wrangler manual to live behind an LS motor for too long.
My jeep is a manual. I havent seen a swap on a stock manual. Just want to make sure it could be done. Im sure I would add a T56 trans.
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Old 05-15-2017, 10:39 AM   #4
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motech is the best place for LS swaps. Home

They have an upcharge for a manual.
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Old 05-15-2017, 11:40 AM   #5
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IMO the Jeep manual is not up to the task, pick an alternative trans and build accordingly.

I only have 1 friend that did an LS2, he paired it with an Atlas and 6L80e.
Rock Jock 60s, 5.5" RK coilovers and 42s round out the build. Recently added a supercharger because Jeep.... LOL

RPM Extreme did his conversion. But FWIW the engine was the cheapest part of the swap.
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Old 05-15-2017, 11:41 AM
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Originally Posted by stumblinhorse View Post
motech is the best place for LS swaps. Home

They have an upcharge for a manual.
Thanks for the link
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Old 05-23-2017, 10:16 AM   #7
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You can run the JK NSG370 behind the Gen IV 5.3 max, anything larger will scatter it. We have done several 5.3/JK 6 speed builds and they work well.

TBH the 6 and 8 speed auto's are a step above the manuals IMO. Low friction, low heat, more diverse gearing, torque multiplication, manual mode, adaptive...... The 8 speed with a Gen V engine is amazing providing tons of low end torque, enough to spin 40's off the line while cruising comfortably just over 2,000 rpm at 80 mph.

If you want a manual trans that will hold up to a 6.0 or 6.2 you have a couple choices. The NVG 4500 works but is clunky and has a granny first gear cause it's meant for a truck. The Tremec 6060 is awesome and Rockland Gear offers a 4WD version but it's not cheap. The Tremec is strong and shifts fast but is still not up to the auto IMO.

We have done many 8 speed builds to date here's one:

http://www.youtube.com/watch?v=-0nY9kJJ1kY&t=3s
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Old 05-24-2017, 10:08 PM
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Thanks for the reply Robbie. I was looking at this motor
GMP-19256529 - Pace Performance LS3 376CID 525 HP Crate Engine
Also how much harder is it to make the swap from Manual to the Auto trans? Anything else Ill need besides,
Your kit
Motor
Trans?
Do I need the engine controller or does that and the harness come with your kit?
Im looking to get moving on this. Im going to try and tackle it myself and if all else fails Ill bring it to you lol.
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Old 05-26-2017, 11:55 PM   #9
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Quote:
Originally Posted by nvjeep View Post
Thanks for the reply Robbie. I was looking at this motor
GMP-19256529 - Pace Performance LS3 376CID 525 HP Crate Engine
Also how much harder is it to make the swap from Manual to the Auto trans? Anything else Ill need besides,
Your kit
Motor
Trans?
Do I need the engine controller or does that and the harness come with your kit?
Im looking to get moving on this. Im going to try and tackle it myself and if all else fails Ill bring it to you lol.
Manual to auto swaps are fairly easy we do a lot of them. The new 6 and 8 speed automatics have advantages over the manuals with more diverse gearing and ultra fast shifts; plus they can handle 500+ HP.

IMO the Gen IV 480 and 525 are becoming obsolete with the introduction of the Gen V engines. The days of making HP with big cams and high revs are over when compared to the new technology engines. With CVVT, high compression, direct injection and AFM a 6.2 L86 will take most performance crate engines 0-60 on regular gas. We have built many 500+ HP JK's and while they have good HP the torque is in the upper rpm range. An L86 has nearly 350 ft lbs of torque off idle to the redline. It's torque that moves your JK and the Gen V engines have it.

In addition to running on regular gas the Gen V engines idle at 500 rpm for excellent crawling, there are no HC emissions and rump rump idle from the cam profile. No watering eyes from idling in the garage, having a built in vacuum pump means good braking at idle unlike the cammed engines.

Combine this with an 8 speed transmission and it's hard to beat for performance and economy. With 4:88's a heavy JK can spin 40's off the line and cruise comfortably at 80 MPH just over 2,000 rpm.
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Old 05-27-2017, 09:19 AM   #10
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Quote:
Originally Posted by nvjeep View Post
Hey guys not sure if this is the right section or not. If not sorry for the post, maybe someone can point me in the right direction.

Ive been thinking about a LS2 swap in my 2008 JKU. I found a decent deal on the motor. The thing I cant seem to find is info about a 6sp manual trans. My JKU is a manual and I want to make sure others are doing this swap with a manual.

Thanks guys.
The guys at motech are a wealth of information, they have been doing LS swaps in JK's for about 10 years, and they have done the swaps with manual trans. They can probably point you in the right direction and probably have the necessary parts for it.

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