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Unread 11-26-2011, 12:31 PM   #1
DesertPete
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Suspension change for more comfortable trail ride?

I just spend a couple of weeks in Moab with my stock JK, riding "moderate" grade trails (ie Pucker Pass, not Poison Spider). My wife hated it. She pointed out that last year we rode the same trails in our Yamaha Rhino side-by-side and the ride was much more civilized and comfortable. Even the Jeep Liberty we had back then seemed to be an improvement over the JK. The JK tosses you from side to side and up and down while riding over rocky trails that the Rhino just glides across. Ok, in fairness, the Rhino tires have only 10 and 14 lbs of pressure. I dropped the JK's tire pressures down to 25 psi and that helped some. I could have gone lower but there were paved roads on the return trips and I was too lazy to keep adding pressure back. There are a lot of suspension options offered for JKs, but there isn't much information to with them to tell you what they are designed to do. I'm wondering if there might be something out there designed to keep the Jeep from bouncing so badly and tossing us around so much. I'd welcome advice from you folks who have much more experience with JKs than I do. Thanks!

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Unread 11-26-2011, 01:12 PM   #2
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You are getting tossed side to side because you still had the swaybar links connected. Unhooking them will make a huge improvement with being tossed side to side. Also you still could have let out more psi in your tires for an even more comfortable ride.


EDIT: Shocks can make a big difference too.
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Unread 11-26-2011, 01:23 PM   #3
DustinS
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Being a twin live axle suspension design, it can only be so comfortable. It's rough, it's rudimentary, but it's bulletproof.

That said, a quality lift like a 2" OME may increase ride comfort due to the extra suspension travel allowed.
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Unread 11-26-2011, 03:23 PM   #4
Karl
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It's the air, mostly

Your tire pressure was too high: 25 psi could be consider low highway pressure, for tires that commonly are inflated to 30 or 35 psi for on-road use. You should have aired down to the 10-14 psi range. That would have made a far more noticeable difference in your ride.

If you also didn't disconnect your swaybar, you had more swaying that you otherwise would have.
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Unread 11-26-2011, 04:09 PM   #5
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Quote:
Originally Posted by Karl
Your tire pressure was too high: 25 psi could be consider low highway pressure, for tires that commonly are inflated to 30 or 35 psi for on-road use. You should have aired down to the 10-14 psi range. That would have made a far more noticeable difference in your ride.

If you also didn't disconnect your swaybar, you had more swaying that you otherwise would have.
I agree completely.

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Unread 11-26-2011, 04:30 PM   #6
Karl
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Clarification

I should have noted that the increase in comfort in airing down from, say, 35 psi to 25 psi is much less than in going from 25 psi to 15 psi.

The first decrease of 10 psi takes you from a very firm tire to a tire that feels a little underinflated. The next ten takes you from that to a tire that's soft and conforms to the shape of obstacles.

(Go another ten and your tires become Silly Putty.)
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Unread 11-30-2011, 10:07 PM   #7
DesertPete
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Thanks to all; that's a big help!

Ok, so disconnect the sway bar links (I'd thought that meant anti sway bar); lower the air pressure another ten pounds, and look into a 2" OME lift kit for its longer suspension travel, and/or replacement shocks. I can do that.

This may sound odd, but with 10-15 lbs of air in the tires is there much of a chance they will come off the beads (I do carry some WD-40 and matches, just in case...)

Thanks again!
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Unread 11-30-2011, 10:23 PM   #8
Karl
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Quote:
Originally Posted by DesertPete View Post
Ok, so disconnect the sway bar links (I'd thought that meant anti sway bar); lower the air pressure another ten pounds, and look into a 2" OME lift kit for its longer suspension travel, and/or replacement shocks. I can do that.

This may sound odd, but with 10-15 lbs of air in the tires is there much of a chance they will come off the beads (I do carry some WD-40 and matches, just in case...)

Thanks again!
Swaybars and anti-swaybars are two terms for the same thing (something like the way "fat chance" and "slim chance" are equivalents). Yes, just disconnect the swaybars.

You shouldn't have any problem with 15 psi; I haven't seen anyone lose a bead at that pressure, though I've seen it happen (still uncommon) at 10 psi.
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Unread 12-01-2011, 06:07 AM   #9
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Don't rely on wd40, now that they use c02 as a propellant it's extremely difficult to ignite

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Unread 12-03-2011, 09:44 AM   #10
DesertPete
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Good catch

Spyder6 wrote: "Don't rely on wd40, now that they use c02 as a propellant it's extremely difficult to ignite."

Dang. That is good to know. I thought it used butane. What's next, hair spray?

Karl wrote: You shouldn't have any problem with 15 psi

Thanks again.http://cdn.jeepforum.com/forum/image...s/HIGHFIVE.gif
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Unread 12-03-2011, 08:14 PM   #11
MikeHoncho88
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My opinion is the rough side to side action you described has more to do with a solid axle vs. the two independent suspension vehicles you drove previous. i have always noticed a rougher ride over certain terrain in a solid front axle vehicle.
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Unread 12-03-2011, 08:28 PM   #12
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if you plan on wheeling a lot i highly suggest getting a suspension style seat. Matercraft, Coberue, PRP, ect they make a world of difference wheeling
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Unread 12-03-2011, 08:56 PM   #13
Charles
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It's been beat to death, but get some 35's and put them around 18PSI and enjoy. The sway bar disco will help too.
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Unread 12-03-2011, 10:18 PM   #14
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One more important thing is your shocks.
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Unread 05-03-2014, 11:25 AM   #15
DesertPete
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Advice appreciated and taken

Thanks for all the good advice. A year ago I had an AEV Dual Sport suspension system installed. Dual rate springs matched to Bilstein shocks with 2 1/2 inch lift and geo correction bracket. Also added a steering stabilizer and JKS "quicker disconnects" on the sway bar. I haven't been back to Moab yet, but did a 9000 mile trip through Canada and Alaska since then. Much improved. Now looking for bigger tires which I will run aired down as many of you suggested. Thanks again.
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