Help with Pinion Angle

The tires appear to be wearing perfect but they only have a few thousand miles on them. I was just in for the 5k mile service and they checked alignment. My dealer specializes in upfits and lift kits so the tech knows what he’s doing. I can try to get a hold of the alignment sheet. I’m not sure why I feel the exact same vibration at 65mph as well though. It doesn’t make sense to me.

 

Everyone has gone through the "oh fuck" moment. Just gotta push through it and find out what's needed to solve the problem...and possibly learnt to live with small vibrations.

 

It's not a lift thing, so much as the amount of scrub you added. They might not have given you enough toe-in.
If they set it for zero toe, you are most definitely toe-out under load.
20-25 mph under deceleration and 65 mph under cruise could just be the sweet spots.
I'm not saying it still couldn't be driveshaft angles. But the fact you can control it with the brakes makes me suspect.

 

Here is my alignment sheet

 

With those numbers and your set-up, it's plowing out with negative camber. Lack of caster is giving you an unstable feeling.
For your set-up.
Caster should be +2.8
Camber should be +0.5 or +0.6 driver/+0.4 pass for road crown
Toe should be +0.06

 

I think they maxed out what they could with my stock UCAs. I may have to deal with it until I change everything over to 5100s and AAL and SPC UCAs