I think I've read that you can get away with just buying lower front and upper rear adjustable controls to fix geometry issues. What if I just want to push back my rear axle, can I just buy upper rear control arms? Is there anything wrong with that? How important is it to buy all the controls at once?

 

if you want to push your axle back, you will need both adjustable lower and upper arms to do that. the lowers will position your axle and the uppers will allow you to retain your pinion angle. having said that, you do not want to push your axle back any further than you need to recenter it. if you go too far back, you will have issues such as your track bar making contact with your coils.

 

Ah thanks. I know with a 2.5 inch lift on a 4d, the amount of being off center will be minimal, however is there a good way to see how offcenter it is? I mean here is what I currently have, I plan on tossing in some spacers to go with the coils/shocks just to yield a bit more lift. how far back can it be pushed, all these adjustments seem like they net not even a few inches, I just want to make sure I can have everything set perfect



most of my concern comes from trying to get rid of flightyness on the highway, as well as stuffing some 35s in there

 

flightyness on the highway is caused by a lack of positive caster. installing a set of adjustable FRONT lower or upper control arms will allow you to make this adjustment.

 

You are a wealth of information! Does it matter if I go with uppers or lowers; is one preferred? How much of a lift do you usually need to see a real need for rear control arms then?

 

technically, uppers are what is normally used to set caster and, they are cheaper but, they are also more difficult to install. having said that, the amount of adjustment you need to make is very small and so, lower can be used much in the same way that cam bolts are used. they are a bit more expensive but, are much easier to install. in fact, you don't even need to jack up your jeep or remove the tires to do it - i personally would recommend going this route. if you do, you pretty much just need to set them to 23" eye to eye and, you will most likely be on

 

X2, I have upper front on mine and the were a PITA! especially since you have to cut the frame bolt on the passenger side upper, since you can't remove it without either cutting it or moving the exhaust manifold. That being said I got everything adjusted great with the uppers. Either will work.

 

Awesome, thanks for the info!

 

and they are easiest installed with all four tires on the ground