JK has 3" mopar lift that came with front lower control arms (not adjustable) and 35s

My front driveshaft crapped out on me so I replaced with a coast from northridge. I'm getting a slight vibration now that I am assuming is due to the pinion angle being off.

My question is would I be better off going with adjustable uppers since those or stock or replacing the lowers with adjustable in order to get the pinion angle more in line with the new driveshaft?

 

You won't be able to get the front pinion in line. It is a zero sum angle between pinion and caster. As you increase pinion, you decrease caster. You'd have almost no caster.

The vibration is likely due to something else. The yoke not torqued correctly, bad balance on the shaft, etc. Might be worth taking just the shaft out and driving it. If the vibe is gone, then you know it is not the yokes and definitely the shaft itself.

Might be worth a call to Northridge as well. They sell a ton of Coast shafts.

 

Agree^ if those are the same fixed lowers TF offers, they measure 3/16 longer then stock. Not enough to add significant caster. Pinion should be just fine.

 

Alright so the first thing I'm going to do when I get off work is pull the shaft off. If the vibrations are still there then it's a problem with torque on the yoke. And if the vibration is gone then there's a problem with the balancing on the shaft itself?

 

By the photo the pinion angle looks pretty good. Did you install the DS and new yokes ?
If so did you check pinion nut torque first before taking nut off? Also do you have any idea
What the pinion angle measures now.