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?

 

i have the R.E 3.5 superflex and have no issues at all,that even loading the rear hitch with 300 lbs,no drifting darting, nothing handles great,my caster is set at +6 degrees. aftermarket sway bar in the rear? did you mean track bar? i just used the rear trackbar relocation bracket which is much better than the earlier design and it works great.....not sure what your prob could be

 

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.

 

I'd put it on an alignment machine and see where your at.

 

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?)

 

Agreed on Caster being the first thing to look at.. Effects stability dramatically. Check the toe while you are there..

 

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.

 

What you described in the original post sounds like oversteer. A stiffer rear sway bar will make that problem worse, although it would take care of the resulting symptom of body roll.

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.

 

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.

 

Wow, what a wealth of information, starting to feel alot better about this, and learning quite a bit in the process...I installed the RE lift my self (2 yrs ago)and immediately took it to a local (reputable) off road shop he adjusted/corrected thrust angle, and alignment but did not mention caster. I lived in Hawii so never really got over 50 mph (btw, great off roading in Hawaii) i did have some pretty agressive off road trips since...maybe it is due for a realignment. anyway, I just noticed the "flightiness/dating" was at dangerous levels when I got back to Tx and faster hwy speeds...

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.