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Old 12-24-2012, 03:20 AM   #1
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New Lift drives so bad I need Xanax if I go over 65 MPH

I recently got a new 2013 JKUR. I installed a Rock Krawler 2.5 MAX TRAVEL PRO MID ARM SYSTEM paired with the FOX 2.0 4-6 inch lift Shocks.. Also have FOX steering stabilizer. 35" Wrangler MTR Kevlar tires 35 psi. I had 2 alignments done.

I have had the lift/shocks installed for about 2k miles so i think it is broken in (I feel like it only gets worse as it gets more and more broken in). Tires are new.

My ride is so stiff that if there is any glass in the Jeep it will be broken after a 15 min ride.

On the streets its bearable but if I need to get on the highway and go over 60 mph, help me god.. It is scary to drive... The jeep feels like it can wipe out at any moment. It sways slightly from side to side possibly because of wind and if I need to pass a truck it is really scary my hands start to shake from fear.. If the highway is bumpy the poor ride combined with the stiffness of the shocks make it undrivable over 60mph..

I don't like the way it steers at high speeds either.. With the new fox steering stabilizer it feels WAY too soft at highway speeds I really have to keep 2 hands on the steering wheel because it way soft. It is not responsive at all and I hate that. I like a stiff steering, anyone know if this is adjustable?

Before buying this setup I read tons of reviews and asked plenty of people for advice.. Never have I heard of anyone having these ride issues.
Any ideas or advice? Is there anyway to adjust the ride/shocks/steering stabilizer?
Please HELP!

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Old 12-24-2012, 03:28 AM   #2
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But how does it look?








Sorry to hear bro hopefully its an easy fix

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Old 12-24-2012, 03:43 AM   #3
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But how does it look?








Sorry to hear bro hopefully its an easy fix
Lol it looks badass but on the highway I look like I need a diaper..
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Old 12-24-2012, 04:51 AM   #4
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You my friend need to lower your psi to about 25-28.

Post the alignment specs so we can look at them.
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Old 12-24-2012, 04:56 AM   #5
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Quote:
Originally Posted by kjeeper10
you my friend need to lower your psi to about 25-28.
x2
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Old 12-24-2012, 06:42 AM   #6
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Why'd you replace the SS?


I'm with Ken. Drop those PSIs a lot. I have the exact same setup as you and that made a ton of difference for me. The ride softened up and the tracking was eliminated mostly.


PS: Hey, Ken is a moderator! And ESP too. Congrats guys.
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Old 12-24-2012, 06:46 AM   #7
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My first thought was air pressure as well!
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Old 12-24-2012, 06:48 AM   #8
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Why'd you replace the SS?


I'm with Ken. Drop those PSIs a lot. I have the exact same setup as you and that made a ton of difference for me. The ride softened up and the tracking was eliminated mostly.


PS: Hey, Ken is a moderator! And ESP too. Congrats guys.
x3 on psi and thanks kramer.
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Old 12-24-2012, 07:02 AM   #9
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Quote:
Originally Posted by kramer2k
Why'd you replace the SS?

I'm with Ken. Drop those PSIs a lot. I have the exact same setup as you and that made a ton of difference for me. The ride softened up and the tracking was eliminated mostly.

PS: Hey, Ken is a moderator! And ESP too. Congrats guys.
Thank you
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Old 12-24-2012, 07:06 AM   #10
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Post your final alignment specs, especially the caster angle, it's critical. I have no experience with that brand of lift or shock but they can't be all bad. I have heard they yield significantly more lift than advertised. A high steer kit might be in order as bump-steer could be what you feel at high speed. You might lower the tires to 22-24 psi for a test run to see if it is just a psi issue. I would guess 26-28 would be perfect long term.
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Old 12-24-2012, 07:10 AM   #11
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I feel the problem your having is that you choose the stiffest tire and paired it with the stiffest shocks. The suspension just amplifies the combo. Great combination for offroading but you sacrifice on road comfort.

My suggestion is to also lower PSI but I Have a feeling that its not going to be enough for you. The MTR Kevlar tires are just too stiff of a tire. Some guys are fine with it on road but others are not. I helped Kurtz out with his set up and he had the Kevlar 35" paired with Bilsteins (a softer shock than the fox) and it was still a noticeably stiffer ride.
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Old 12-24-2012, 07:29 AM   #12
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Quote:
Originally Posted by matador View Post
i feel the problem your having is that you choose the stiffest tire and paired it with the stiffest shocks. The suspension just amplifies the combo. Great combination for offroading but you sacrifice on road comfort.

My suggestion is to also lower psi but i have a feeling that its not going to be enough for you. The mtr kevlar tires are just too stiff of a tire. Some guys are fine with it on road but others are not. I helped kurtz out with his set up and he had the kevlar 35" paired with bilsteins (a softer shock than the fox) and it was still a noticeably stiffer ride.
x2!!!
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Old 12-24-2012, 07:40 AM   #13
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Very stiff combo all around. I looked at the FOX shocks and KING shocks but everyone says they are super stiff.

I was very stiff when mine first came out of the shop, my tires were at 37PSI. I took it on the interstate and had to white knuckle it. I lowered the PSI to 29 and it is like a cadillac.
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Old 12-24-2012, 07:43 AM   #14
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X4 on PSI. I have 35's and run them at 25PSI.

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Old 12-24-2012, 07:50 AM   #15
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I have the RK 2.5 lift with 35 mtr's and billsteins. I lowered my PSI to 30 and she is smooth at 65-70 mph
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Old 12-24-2012, 07:55 AM   #16
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Yea ... And make sure the psi gauge is accurate.

Months of using the same gauge, I found out it was over 5 psi low.
Driving 35's @ 32-35 psi is no fun.
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Old 12-24-2012, 07:56 AM   #17
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Do gauges become less accurate over time? Is that what you mean?
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Old 12-24-2012, 07:58 AM   #18
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how much shaft is exposed on the shocks? you could be near full compression at ride height and that wont help a thing. Also I would never run a fox shock off the shelf. They are great if you know how to tune/valve shocks not so much bolt in and go.
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Old 12-24-2012, 07:59 AM   #19
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Most lifts ride Stiffer than stock. I have rk3.5 and it rides better than expected for sure.

I have never had Kevlar tires, but I would imagine the stiffer sidewall doesn't help things either.
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Old 12-24-2012, 07:59 AM   #20
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Oh god i have this setup pretty much hope mine doesnt ride like dirt
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Old 12-24-2012, 08:00 AM   #21
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Looks like you can adjust the fox shocks for stiffness. Did you try adjusting the shock pressure to soften the ride
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Old 12-24-2012, 08:00 AM   #22
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Quote:
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Do gauges become less accurate over time? Is that what you mean?
Yes they do. Depending on the type they can vary significantly.


The round ones can be thrown off just by dropping them a few times.

We use the stick type at work daily, and go thru easily 100 in a year.
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Old 12-24-2012, 08:11 AM   #23
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Just put a RK 2.5 on my 2010 with 33x12.5x15s on it. I had to be out of town so I ask a friend who has built more than one NHRA legal race car to do the install, he now owns an auto repair shop but knows about setting up suspensions. He did the job with alignment for 4 hrs shop time. My 2010 rides better and feels more stabile than it did stock. I drive mine 70-75 with no issues at all. After doing the lift I checked my tire pressures and found they were upward of 40, I let them down to 32 and that only helped but it still felt fine even at 40. The only thing I have different on my rig is I chose Bilstien 5100s.

Hope you get this worked out but I'd say it's not the RK kit. Probably a bad alignment.
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Old 12-24-2012, 08:23 AM   #24
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Lol it looks badass but on the highway I look like I need a diaper..
Now that is funny
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Old 12-24-2012, 08:26 AM   #25
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Quote:
Originally Posted by ESP
Do gauges become less accurate over time? Is that what you mean?
Somebody responded to one of my post saying the same happened to him.

Quick search told me a few things.

-not all gauges are accurate anyways
-cold weather will affect a metal dial gauge
-dropping a gauge on pavement is no good (or 10 drops)

I bought a slime digital style psi gauge. Little pricey but worth it.
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Old 12-24-2012, 08:33 AM   #26
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Quote:
Originally Posted by Matador
I feel the problem your having is that you choose the stiffest tire and paired it with the stiffest shocks. The suspension just amplifies the combo. Great combination for offroading but you sacrifice on road comfort.

My suggestion is to also lower PSI but I Have a feeling that its not going to be enough for you. The MTR Kevlar tires are just too stiff of a tire. Some guys are fine with it on road but others are not. I helped Kurtz out with his set up and he had the Kevlar 35" paired with Bilsteins (a softer shock than the fox) and it was still a noticeably stiffer ride.
Talking about Kevlar, what can we recommend for the smoothest riding tire.
I'm thinking save the kevlars for wheelin and snow? Throw something smooth for daily driving. Any recommendations.
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Old 12-24-2012, 08:37 AM   #27
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Quote:
Originally Posted by SeeLee

Talking about Kevlar, what can we recommend for the smoothest riding tire.
I'm thinking save the kevlars for wheelin and snow? Throw something smooth for daily driving. Any recommendations.
Duratracs are a forum fave.
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Old 12-24-2012, 08:45 AM   #28
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Originally Posted by kjeeper10 View Post

Somebody responded to one of my post saying the same happened to him.

Quick search told me a few things.

-not all gauges are accurate anyways
-cold weather will affect a metal dial gauge
-dropping a gauge on pavement is no good (or 10 drops)

I bought a slime digital style psi gauge. Little pricey but worth it.
I had one of these for 7 years and dead on accurate ...the thing was all beat to hell n finally died...got a few slime gauges n they where junk being off 5- 7 psi ..so ordered a new accutire and all good again

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Old 12-24-2012, 08:53 AM   #29
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Originally Posted by bengen1

I had one of these for 7 years and dead on accurate ...the thing was all beat to hell n finally died...got a few slime gauges n they where junk being off 5- 7 psi ..so ordered a new accutire and all good again
5-7 psi off + balancing issues = diaper.
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Old 12-24-2012, 10:49 AM   #30
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This is the 2nd person this week I've seen post about a bad ride on a new lift. Only common factor is the fox shocks.

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