i am haven a caster angle problem do i want to get upper or lower adjustable control arms ?i was reading about it and the tech page said upper but i am not sure some one which is best to replace ?

 

To correct the pinion angle u only need upper control arms. You must also get EVO control arm lock nut bec normal nuts on the control tends to loose after a little while. To set caster u need lower control arms but that u only need for the front.

 

I like the lowers myself, especially if your Jeep is lifted.

 

Uppers are better for caster adjustment, the problem is not many aftermarket uppers go short enough to make the proper adjustment (I think curries go short enough). Most people get the lowers because to adjust the caster you just extend them. There are also the added bennifits that most are stronger than the factory arms and help to provide better articulation with the johny joint type ends most provide. I run TF lowers myslef, but I have heard good things about almost all the adjustables available......apparently it doesn't take much to improve on the factory design.

 

I have the TeraFlex lowers, works fine for castor. Plus they're twice as heavy as the stockers. You will not trash these.

 

What he said . . .

 

x3!!!

 

Unless you are cutting/rewelding the steering knuckles, you can't change caster without changing pinion angle. Higher pinion angle = less castor. They can be changed with EITHER upper or lower adjustable control arms.