SWRUBI

I'm running a 2 - 2.5" lift with OME springs and shocks. Rear UCA's and FRONT LCA's are on my shortlist of things to do based on what I'm reading in other posts. To get the driveshart and pinion lined up is the thinking correct that the rear uppers will need to be shorter than stock UCA's to accomplish this in the rear and longer LCA's in the front to get the angles lined back up correctly?

v8zracer260z

You'll want lower adjustable control arms for both front and rear to correct pinion angle and extend your wheelbase. Upper control arms help the rest of your wheelbase back.

Dr. Satan

You should need to lengthen the rear uppers to get the pinion tilted upwards toward the t-case.

Mark Doiron

Are you swapping driveshafts? Front LCAs are good for correcting caster to fix steering feel. If you are running OEM DSs, adjust for good steering feel with no DS vibration. Rear uppers are useful if you have an aftermarket DS (lower could be used, but upper does the job and is cheaper).

nthinuf

Upper and lower do the exact same thing, just backwards of each other.

Front:
Upper - lengthen to lower caster/raise pinion ; shorten to raise caster/lower pinion
Lower - lengthen to raise caster/lower pinion ; shorten to lower caster/raise pinion

Rear:
Upper - lengthen to raise pinion ; shorten to lower pinion
Lower - lengthen to lower pinion ; shorten to raise pinion



So, your rear uppers would need to be longer than stock to raise the pinion, or shorter than stock to lower the pinion. Which way you go depends on which type of driveshaft joints you are running and what angle you want to achieve.

Quentin_T

Depending on how you wheel your rig, I would suggest rear lowers first. The stockers are not very stout, I know I bent mine!