Softening the ride - JeepForum.com
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post #1 of 22 Old 05-03-2016, 09:14 PM Thread Starter
clthomas614
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Softening the ride

It's bought a 2012 JK Unlimited to make my second jeep now. I'm loving it but the wife complains about how rough it is. I know "it's a jeep" what do you expect, right? It has 33 X 11 X 17 tires/ wheels, but no lift. Any suggestions on shocks or steering dampeners that may smooth out the everyday road drives? I was looking at bilstein 4600 shocks. Thoughts?


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post #2 of 22 Old 05-03-2016, 09:38 PM
Mr_Tim0
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i would always recommend Rancho for smoother ride
their 9000xl shocks have adjustable knob
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post #3 of 22 Old 05-03-2016, 10:37 PM
222Doc
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you have to much air in the tires i will bet. stock runs 37. Those will be in the 27-30max range. But to run that you will need to be able to program the lower psi threshold for your TPIM. you must have bought some kind of programmer for the taller tires.

That is the 1# reason ride gets worse no matter the shocks or the lift. try that first its free. I run 27 in mine have since it was made. max have the tpim set to 0.

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post #4 of 22 Old 05-04-2016, 02:34 PM Thread Starter
clthomas614
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Thanks for the info. On the tires it suggested 40psi max and that's what they were inflated to. I took them down to 32psi but have not been out yet to test it out. Appreciate it
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post #5 of 22 Old 05-04-2016, 03:35 PM
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Quote:
Originally Posted by clthomas614 View Post
Thanks for the info. On the tires it suggested 40psi max and that's what they were inflated to. I took them down to 32psi but have not been out yet to test it out. Appreciate it
Close - the side wall states the maximum weight and the min PSi (cold) to support the maximum weight. TWO RULES: Never exceed max weight (load limit) and never go more than 9% below the PSi for the actual GVWR (load) of the vehicle.
If you have half the weight - you only need half the PSi... or conversely - if you only have half the PSi you only have half the load limit!

Typically the JKU is 1475 lbs per tire at GVWR.
A load range D would only need around 30PSi - a load range E would only need 25PSi - but you MUST verify this with the math based on the actual tire's weight/PSi stamp - some Es are 3175@55, some are 3190@65 etc...

J Wm Bishop EA, ASADE
The wagon should, of course, be as light as possible, but strength should not be sacrificed to lightness, for on any but the regularly traveled roads, the wagon will get many a
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post #6 of 22 Old 05-04-2016, 03:55 PM
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I run 25-27 in my 35" load range D and according to the chalk test it could still go lower but I don't know that I feel comfortable any lower.

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post #7 of 22 Old 05-05-2016, 04:49 AM
karlo
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Another vote for adjustable Rancho's so that you can set them to how you like the ride.
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post #8 of 22 Old 05-05-2016, 08:15 AM
JIMBOX
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Agree-


RS9000XL (adj), will solve "MOST" ride trouble, but-


You've gotta drop the tire pressure--


I run my 33's at 28/29--better hiway steering control and/w the shocks--I setup for hiway/off-road/towing-


Whatever


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post #9 of 22 Old 05-05-2016, 09:16 PM
propped1
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All these shock recos... He just bought it. Now he has to go replace the shocks? Air as mentioned. Big difference.

Only reason I am chiming in. Are you sure there is no lift? If those are 33s, It looks lifted to me. Cameras and stuff... might be seeing things, but it is totally leveled out. The factory suspension has a slight rake to it toward the front. I'd check again. 2.5 I'd bet

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post #10 of 22 Old 05-06-2016, 08:35 AM
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Quote:
Originally Posted by propped1
All these shock recos... He just bought it. Now he has to go replace the shocks? Air as mentioned. Big difference. Only reason I am chiming in. Are you sure there is no lift? If those are 33s, It looks lifted to me. Cameras and stuff... might be seeing things, but it is totally leveled out. The factory suspension has a slight rake to it toward the front. I'd check again. 2.5 I'd bet
Was thinking the same thing myself, I have 33's with a 2" lift and mine doesn't sit that high in the front plus the heavy bumper Just a thought, maybe it's a really stiff spring rate?
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post #11 of 22 Old 05-06-2016, 09:17 AM
pentastarguy
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if lifted check out out old man emu springs. they different rates.
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post #12 of 22 Old 05-06-2016, 05:35 PM
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I just put EVO Plush ride springs in mine . Its much softer than the 2.5" AEV they replaced . I swapped the shocks first from the AEV/Bilstein shocks to the Rancho 9000xl's . That improved the AEV ride but the EVO springs softened it up some more. I can't play with tire pressure as anything less than 33 makes the Jeep drive like it has a rubber steering column at 60 mph or better, 35-12.50-17 KO2s on Pintlers . I started at 28 as most of the internet world seems to recommend but terrible at high speeds.
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post #13 of 22 Old 08-09-2017, 01:14 PM
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probably get 2-3mpg less at the lower psi since your contact patch and rolling resistance increases.
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post #14 of 22 Old 08-10-2017, 12:12 PM
Ej132
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Originally Posted by brillybones View Post
probably get 2-3mpg less at the lower psi since your contact patch and rolling resistance increases.
2-3 mpg is a bit much to say, tested mine on highway first at 40psi (hypermiler mod) then at 25 where I run my 35s on the TJ, saw about 1-1.5mpg difference
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post #15 of 22 Old 08-10-2017, 12:39 PM
Ross
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Quote:
Originally Posted by clthomas614 View Post
It's bought a 2012 JK Unlimited to make my second jeep now. I'm loving it but the wife complains about how rough it is. I know "it's a jeep" what do you expect, right? It has 33 X 11 X 17 tires/ wheels, but no lift. Any suggestions on shocks or steering dampeners that may smooth out the everyday road drives? I was looking at bilstein 4600 shocks. Thoughts?


Attachment 2853057


Is your other Jeep a Wrangler, if so how does it ride compared to that one?


Have you or your wife ridden in a stock JK so you know what to compare it to?
Start with air pressure. Your tires and the pressure you run them at will make a BIG difference in any vehicle.

01 TJ,33X12.5Flaken WP ATs,Winch, ARBs F&R, belly up, some armor,4.0,5spd
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