Installed Rubican Express short arm 3.5...handles very poorly on Highway...help.
05-01-2010, 01:40 PM
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Installed Rubican Express short arm 3.5...handles very poorly on Highway...help.
I have a 4dr Rubicon and I installed the Rubicon Express Short arm 3.5 now it "walks" all over the road at hwy speeds, at a very dangerous level. I also installed heavy-duty track bars and upgraded the Steering stabilizer...Could the problem be the hyme joints in the control arms or do i need an aftermarket sway bar in the rear? Any ideas?
05-01-2010, 07:31 PM
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I have a 4dr Rubicon and I installed the Rubicon Express Short arm 3.5 now it "walks" all over the road at hwy speeds, at a very dangerous level. I also installed heavy-duty track bars and upgraded the Steering stabilizer...Could the problem be the hyme joints in the control arms or do i need an aftermarket sway bar in the rear? Any ideas?
05-01-2010, 09:30 PM
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Installed Rubican Express short arm 3.5...handles very poorly on Highway...help.
Thanks for the info...I do have aftermarket track bars...but the sway bar is still stock...maybe i just need to beef up the rear sway bar. Your thoughts? Do you think it might just be an alignment thing? It really "walks" bad, but I do love the flex when off road though.
05-01-2010, 09:44 PM
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Thanks for the info...I do have aftermarket track bars...but the sway bar is still stock...maybe i just need to beef up the rear sway bar. Your thoughts? Do you think it might just be an alignment thing? It really "walks" bad, but I do love the flex when off road though.
05-01-2010, 10:05 PM
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Read this one in the Suspension FAQ's...
Q: What is Caster? How much do I need?
You could also do a quick search here on 'cam bolts' to get some feedback on what everyone thinks of them. (I'm assuming that you did install the cams that came with the kit?)
Q: What is Caster? How much do I need?
You could also do a quick search here on 'cam bolts' to get some feedback on what everyone thinks of them. (I'm assuming that you did install the cams that came with the kit?)
05-02-2010, 07:15 AM
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Installed Rubican Express short arm 3.5...handles very poorly on Highway...help.
Okay then, Thanks for all the great info. I will take it to the shop Monday to have alignment checked, specifically to check the caster, cambor and toe. I will see if that helps. Just a little more info...it does not just pull in one direction it pulls and darts either way at random, especially when it is windy out.
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05-02-2010, 08:07 AM
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Thanks for the info...I do have aftermarket track bars...but the sway bar is still stock...maybe i just need to beef up the rear sway bar. Your thoughts? Do you think it might just be an alignment thing? It really "walks" bad, but I do love the flex when off road though.
As others have stated, you more than likely need to add some positive caster. That will make your front tires feel like they are planted better and remove some if not all of the flightiness and the propensity to feel darty.
05-02-2010, 10:07 AM
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Okay then, Thanks for all the great info. I will take it to the shop Monday to have alignment checked, specifically to check the caster, cambor and toe. I will see if that helps. Just a little more info...it does not just pull in one direction it pulls and darts either way at random, especially when it is windy out.
Read through this one:
http://project-jk.com/jeep-jk-write-...-end-alignment
Even if you don't want to do any of it yourself, it's always good to get an idea of what the alignment tech is telling you.
Another thing to be aware of is that Cam Bolts do not have the range that adj control arms have, and they may not be able to get your caster high enough to offset that much lift.
Last edited by nthinuf; 05-02-2010 at 10:10 AM.
05-02-2010, 12:42 PM
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Installed Rubican Express short arm 3.5...handles very poorly on Highway...help.
The flighty/darty handling is nearly always from too little caster, or too little toe-in, or too much air psi in the tires (more than 28-30), or a combination of the 3.
If you have adjustable lower front control arms so you can adjust your caster between somewhere between 4-6 degrees (non-4wd shops typically will not adjust your control arms, and you will have to do it yourself), adjust your toe-in to factory specs, and reduce your tire psi to about 30 or less, the flightiness will go away.
If you have adjustable lower front control arms so you can adjust your caster between somewhere between 4-6 degrees (non-4wd shops typically will not adjust your control arms, and you will have to do it yourself), adjust your toe-in to factory specs, and reduce your tire psi to about 30 or less, the flightiness will go away.
The RE superflex I installed has adjustable upper control arms front and rear (lowers are not adj) seems like they got that one backwards. Would I be able to adjust the caster via the upper control arms or should I buy some adj. lowers? And thanks so much for your time a knowledge.