I have a 2 dr 2008 JK running 33 x 13.50 Pro Comps with a Full-Traction 3" lift designed for a 4 dr JK. Before and after measurements indicate that I have about a 4.5" net lift since I used a 4 dr lift on a 2 dr Jeep.

In order to adjust the caster to 6-8% as recommended do I need to purchase front adjustable upper control arms, lower control arms, or both?

Do I need to make changes to my drive shafts immediately? If so, from what I am reading, it sounds like I will need rear adjustable upper control arms to change the pinion angle. How do I know what adjustment to make to get the pinion angle correct? Is this just a trial and error process to find the point where the drive shaft doesn't vibrate?

At this time I am experiencing no drive shaft vibration issues, just some steering wobble and a little flightiness that I am trying to correct. My Jeep is used mostly for highway driving with occasional off-roading adventures in Florida where we don't have much in the way of challenging terrain. It is mostly sand and swamps down here.

 

while you won't need one immediately, the severe angle that your rear drive shaft is in will cause the CV joints to fail prematurely so replacing it is a good idea. and, to do that, you will need adjustable rear upper arms. as far as how to set it goes, you just need to have the pinion be parallel to the drive shaft - click on my write-ups and there will be instructions on how to do this on one of the 3" lift kit links. as far as up front goes, if you have a 6-speed, you will not need to replace your front drive shaft. if you have an auto, you should as the spline shaft boot will get torn off. as far as setting your caster goes, you could get away with just getting adjustable front lower control arms and lenghtening them a bit. hope that helps

 

I will purchase the lower front control arms to get the front suspension dialed in and I will plan to get new drive shafts in the next month or so. Thanks for the info.