Hey guys, picked up a '15 JK 2 door about a month ago, first jeep I have owned, definitely not the last! It now has a Currie RockJock 4" lift, the budget one that's doesn't include the LCA's, running Bilstein 5100's all around, on 35x12.5x15 KM2's set at 26 psi. I am coming from a Tacoma that had 5100's all around, spindles, and leafs, ran 305/70r16 at 30 front 28 rear. Now it rode very good for what it had, it surprised me at how it made it through some sections as smooth as it did. Now as of this weekend was the first time taking the JK through the same places I took the taco, and it was quite a ride! I know jeeps aren't ment to go fast, which I wasn't, just cruising at a moderate pace, and to my surprise it was just bone jaring, I have never experienced pain wheeling until that day! I am a bit stumped, because I have a friend with an LJ with a Fabtech 4" on same size MTR Kevlars, and his rides waaay smoother, and I believe he is running 28-30 psi. Im just seeking advice for my scenario as I have already seen countless threads of the same problem but a different scenario. So any advice or experience would be greatly appreciated!

 

Go back to ur Toyota that's why toyota owners make fun of jeeps they r too prissy lol jking.

On another note u said u got a 2 door they r a bit more rough due to there shortness now if u ride a normal tj and u drive the lj u will notice that the tj is much rougher. Test drive a 4 door and It will be the same as ur Tacoma

Also did u disconnect ur front sway bar? Try disconnecting it, it should be better

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What was the advice from the other threads? Could you just be feeling the difference between an independent front and a solid front?

Your tire pressure isn't the issue. Some people say that 5100's on a JK are too stiff, some say they are not - personal opinion. Don't think I have seen any posts on your Currie lift, so can't comment on the coil stiffness. Which specific components are installed? Anything adjustable? Anything to correct steep steering or control arm angles? Both of those can cause road feedback to travel up into the frame. How about the install? Was everything loosened, then tightened while on the ground under full vehicle weight to help eliminate binding?

 

Its not a cadillac. Thats all im going to say so expect a rougher ride.

 

Front sway bar needs to be disconnected.

Your shocks may need to be softened as mentioned, 5100's all the way around on a 2 door is definitely a STIFF ride.

Did you take it out at all stock? If you had you would have had a good comparison point of the jeep as built and then as you modified it with a lift and those new shocks.

Potential fixes, get those LCA's, swap the 5100's for 2 door Rubicon shocks, or other shocks rated for a 2 door jk so they arent so ****ing miserably stiff.

 

Currie Enterprises CJ Axle Parts

Everything but the brake line extensions. When everything was torqued it was on its own weight.

I did a couple times, and it felt much smoother, and was actually using all of the travel(bump pads marked). Whereas now it feels as if barely any travel is being used and it is just bouncing off everything. So could it be as simple as shocks? I do not expecty luxury ride, just smooth and controlled.

 

Sounds exactly like stiff shocks, no give, no travel, just brutal bone jarring hits...... I forget, are 5100's adjustable pressure? If not you might just want to trade them for a set of 2 door rubicon shocks, or upgrade to those ones you can change the stiffness on.

 

Please don't drive your Jeep on road with the swaybar disconnected Instead make sure the links are adjusted properly. Put the Jeep on level ground and adjust with about a 10 degree slope down and both sides should be easy to remove (assuming you have adjustable links). This is one way to improve the ride.
Next is to look into an AEV, Rough Country, or Rancho control arm relocation bracket. Front Control Arm Relocation Kit for 07-13 Jeep JK Wrangler [1106] | Rough Country Suspension Systems
These will also improve the ride by correcting the geometry of the front end. You want the front lower control arm as parallel to the ground as possible. Note: you WILL loose a bit of ground clearance but like most of us doing 95% on road, it's a trade off worth considering.

 

Did you drop the tire pressure while on the trail?

 

I have a 2-door and have been through many lifts, coils, shocks, etc. If you are running a fairly light 2-door, the Bilsteins are about the stiffest shock you can run. I tried them and couldn't stand them (this is not bias as I tried numerous shocks on the same setup).

That said, your lift is probably causing most of the pain. That is a lot of lift for a 2-door and I can tell you from experience, it makes for a crap ride. Without question, you need adjustable front lower arms to get your caster up (shoot for 4.5*-5*). That will make a ton of difference. Before I did that, it felt like my Jeep was going to fall apart over every bump on the highway.

Last item would be the coils. I have not run those coils, but have tried many others. Of everything I have tried, the best ride on a 2-door is metalcloak coils with ARB shocks. Not my current setup, but I wish it was when driving around town.

I realize it is all new, but you really should consider less lift (sell the coils and get different ones - probably a $100 investment max). Your driveshafts won't last long at that height. Going past 3" is expensive and not required unless you plan to run a 40"+ tire.