70hemicuda

Putting in my diff cover today and noticed my coil springs are bowed like this "(" dont have a pic sorry. I have drop brackets and everything seems fine down there. just the bowed springs. And i think my pinion angle is pointing a bit up as well. Do i just need adj lower control arms to fix the bowing and angle?

Martlor13

Upper control arms fix pinion angle

LACK

Need to know more about your suspension setup.

70hemicuda

okay. its a 2000 cherokee lp30. lifted 4.5 inches in the front and 5 in the rear. i got control arm drop brackets in with stock arms. the front axle is rotated so that the diff oover is looking down and the pinion points up in the rear. the springs are bowed as well. I was wondering if the fix for that would be adj lower arms as i think to fix this i would have to lengthen the bottom arms to allow the axle to move forward a bit so flatten out. Just making sure my reasoning is correct.

LACK

Stock arms on that much lift will definitely pull the axle rearward and mess with your pinion angle. To correct the issue i'd get a set of adjustable upper and lower control arms. The lowers will allow you to push the axle forward and the uppers to adjust to the proper pinion angle.

70hemicuda

All four arms is a no go financial wise. Would lowers be better first?

Martlor13

should have saved up before deciding to lift in order to do things properly. Look where skimping gets you haha...have an sye? I hope so

LACK

Yes. Drop brackets help to get the lower geometry closer to stock but adjustable lowers would help you get the axle back where it needs to be.

Constantine

Is your lower control control arm adjustment all the way forward?
CAD brackets allow for adjustablility just as the stock LCA mount does, as long as the adjustment parts were re installed into the bracket.
I do however agree that you should start with adjustable lowers for strength if nothing else.
Good information for when you get to set your castor:
http://go.jeep-xj.info/HowtoAlignment.htm

freegdr

Correct fix all adjustable arms.

Fred/N0AZZ

You need both Upper and Lower adj. CA's with your setup, I know my 4 1/2" lift required them.

MWMahoneyJr

Two unhelpful responses in the same thread. Nice.

Martlor13

How are they unhelpful? The first one corrected the op in his assumption that the LCA corrected pinion angle and the second one helps him by stating things should be done properly in order to avoid issues. Seems pretty helpful to me. What did you contribute haha.

bad_idea

How in the hell would the upper arms solely be responsible for setting the pinion angle? The caster is adjusted by shimming the LCAs from the factory. The caster and the pinion angle are directly related, therefore the logic would tell me the pinion angle is adjusted by the LCAs from the factory.

I have 5" of lift with CAD brackets. I installed fixed length LCAs at 16 1/4" (stock are 15.75) and then shimmed the LCAs 3/8". That put my caster at a decent degree that drives nice. Still running the stock UCAs. Drive this thing to work every day and it handles quite well. Springs are straight up and down. 4WD works great at 40 mphs or so. Haven't had a reason to drive faster in 4WD. In 2WD it runs at 80 smooth with no vibes.

Constantine

Perhaps you and I are the only two that realize this.
I also think that everyone overlooked that he's running CAD brackets.
Hell most UCA'S are too long for a CAD setup around the PO's height.