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Old 04-14-2014, 11:44 AM   #1
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minimum impact lift for 37s

I've been trying to decide how to build my JKU, the only constant is it's a daily driver and I want 37" trail grapplers. I don't have a set $ amount for a budget, but I want to lift it economically without effecting its drivability. If that means I spend 7k, fine, if I can do it all for 4 even better I'll spend the rest on bumpers and armor.

My initial thoughts were c's, sleeves, 4.88s, 3.5" RK max lift, wheel spacer, rancho 9000xls, Tera-flex hinge and 37s. However, I'd love to minimize my impact on steering, risk of DW and all the other nuances that arise like drive shafts or exhaust spacers.

Has anyone done a RK 1.5" lift, 1" body lift and bushwackers with 37s? It seems that this should work just fine and have minimal impact on my Jeeps geometry. Are adjustable control arms necessary for a 1.5" lift? What about brake lines? Trying to decide if I could buy just the RK coils or If I need their kits with 4 or 8 control arms and/or a trackbar.


Finally are all the control arms the same? meaning are the CAs that come with the 1.5" lift the same as the 3.5"? Trying to think of upgradability should I want more height down the road.

Thanks for the help!

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Old 04-14-2014, 12:35 PM   #2
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Most lifts 2.5" and under do not come with control arms since they are not needed.

I would personally suggest a 2.5" lift with the flat fenders rather than mixing both a suspension and body lift. That's probably the easiest from an installation standpoint.

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Old 04-14-2014, 12:48 PM   #3
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Stan at JPI with Rock Krawler and Poison Spyder built a JK two door RK 1.5 X-Factor lift on 37's with PSC fenders reports was this Jeeps flexes, this build was done for PSC to take JK to Moab this week. All new control arms uppers and lowers, track bars the works.
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Old 04-14-2014, 01:25 PM   #4
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Originally Posted by Smokinjoe View Post
Stan at JPI with Rock Krawler and Poison Spyder built a JK two door RK 1.5 X-Factor lift on 37's with PSC fenders reports was this Jeeps flexes, this build was done for PSC to take JK to Moab this week. All new control arms uppers and lowers, track bars the works.

I don't have any problem buying the control arms and track bars if I'll benefit from it with a 1.5" lift, just don't want to spend money just to spend money. Especially if I can reallocate it elsewhere. I do like the fact that if and when I decide to go 2.5 or 3.5, it's a simple spring swap. I'm assuming all the control arms are the same between lift hights.

The 2.5" lift worries me because I don't want to get into drive shafts and exhaust spacers at this moment, especially if it's not needed for a daily driver. I realize you shouldn't need that for a 2.5" lift, but the lifts are made for heavy jeeps and at this moment mine is not heavy so it would sit higher.

I know body lifts aren't "cool" but what is the downside to a 1" lift?
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Old 04-14-2014, 02:16 PM   #5
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Quote:
Originally Posted by JCDriller View Post
I don't have any problem buying the control arms and track bars if I'll benefit from it with a 1.5" lift, just don't want to spend money just to spend money. Especially if I can reallocate it elsewhere. I do like the fact that if and when I decide to go 2.5 or 3.5, it's a simple spring swap. I'm assuming all the control arms are the same between lift hights.

The 2.5" lift worries me because I don't want to get into drive shafts and exhaust spacers at this moment, especially if it's not needed for a daily driver. I realize you shouldn't need that for a 2.5" lift, but the lifts are made for heavy jeeps and at this moment mine is not heavy so it would sit higher.

I know body lifts aren't "cool" but what is the downside to a 1" lift?
I wouldn't worry about exhaust spacers and so forth. You're only talking about maybe a couple hundred pounds difference between "heavy" and "light" Jeeps that weighs thousands of pounds to begin with. And that's not enough to really get into a need for all of that extra stuff you need above 2.5".

As far as body lifts, there's really nothing "wrong" with them. It's just extra work to install both. There's no difference in the work to install a 1.5 or 2.5" suspension lift. But there's a big difference between not installing a body lift and installing one.

The one legitimate gripe people have with body lifts is that it doesn't get your frame up any higher and doesn't help with ground clearance. Will one inch make that much of a difference? Maybe. I'm sure many people out there have strong opinions one way or another.



My build started with a 2.5" lift to run 35's. I have no trouble with exhaust or driveshafts of any kind. When I step up to 37's, I'll just throw on the flat flares and toss the new tires on the rims and head down the road enjoying my Jeep.

In the end, it's your Jeep. If you're worried about it and want the peace of mind, go with the body lift. Build it the way you feel comfortable.
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Old 04-14-2014, 02:40 PM   #6
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Quote:
I know body lifts aren't "cool" but what is the downside to a 1" lift?
the only downside in my opinion is the gap left between the body and the bumpers. a body lift actually is helpful in the fact that you can gain back some lost up travel from a suspension lift. a common set up ive seen to clear 37s is a 2.5 suspension lift, 1" body lift (gaining back that lost up travel), and flat flares. i believe metal cloak claims you can fit 37"s with no lift with their flat fenders, but i dont know if they would offer enough coverage for states that have fender laws.
on the exhaust spacer note, with a 2.5" suspension lift with a 3.6 powered jk, the front drive shaft boot will contact the exhaust at full droop. i dont have a spacer on mine yet (13' jk with 2.5" lift) and havent had any issues, but its on my to do list.

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