With the 4" Superlift and 35" Terra Grapplers it is almost scary at times driving over 50 mph. Especially around corners. Any bumps or ruts in the road and I'm about to run everyone off the road. I only do moderate off-roading and use my Jeep 95% as a daily driver unfortunately. A friend told me to install a steering dampener or stabilizers but I thought I would call on the professionals. Thanks for any help with this!

 

Adjustable front lower control arms!

 

x2

 

Try the
"MODIFIED TECH FAQ - Answers to the Questions Every Newbie Has"
pasted right at the top of this section...

Start with these:
Q: What is Caster? How much do I need?
Q: What are all the components that I will need with a 4" lift?

And then move to:
"Basic Do-it-Yourself Jeep JK Wrangler Front End Alignment"
in the Write-ups area.

After reading through those, let us know what other questions you come up with...

 

Save your money and use it on something else...unless your stocker is leaking its fine.

 

As earlier stated, lower front control arms. Use these to adjust front caster which will give you a more positive feel and better tracking with your front tires.

What you currently have is your front wheels acting like those on a shopping cart and they are going which ever way they want when you hit a bump. By increasing the positive caster.

Your positive caster decreased after your JK was lifted and is probably pretty close to neutral. Bigger meats and a 4" lift will make your vehicle pretty unwieldy and a steering stabilizer isn't going to do anything to help. Stock your caster was set at 4.2 degrees and with the lift it's probably at around 2 degrees. You need to not only return to stock caster, but get in the range of about a positive 6 degrees. Lower control arms will allow you to do this and regain a more positive feeling from your front end.

Here's a basic illustration of caster,

 

I am using a RE 3.5" lift and 1" BL with a set 37X12.5 tires, in fact, my jeep drives okay but not as good as I used to run with 33" tires. However, I use the cam bolts given by the lift kit for caster. To get more road handling, should I replace the stock control arms with a set of adjustable ones, or maybe I didn't installed the cam bolts correctly?

 

I read all of the newbie threads and seem to understand the problem. Now I suppose it comes down to what adjustable front lower control arms you would all recommend and is there a link to show how to calibrate the angle once installed to the 6 to 8 degrees? Any help is appreciated! You all rock

 

in trying to dial in my pinion angle i forgot about caster. took to a shop and found out why i was all over the road, thought it may be ball joints and bearings, but in my attempt to perfect pinion angle i was at -1.1 caster = flat out DANGEROUS on uneven pavement. set to 5.1 and now the jeep drives like a dream.

 

Cam bolts are known for being unreliable and a bad way to set caster. Buy a set of lower front CA's and it'll make all the difference.

Same for the OP.