Am I an idiot?

You shouldn't be getting vibration either. Lol seems like you have a problematic Trac record so far. My 13' I had the billies at 1.75. No issue. Went to 885's on billies. Still no issue. My 14 I have on 885's with billies and no issue. Did you lift the rear?

 

My 2014 has 33k and I just pulled and serviced the cams. I think what saved me from going through this, besides not having salted roads, is hitting the cams with PB blaster over a year ago. I could smell it on the cams when I pulled them. I was surprised the PB Blaster was still present. They were quite rusty. Here's the driver side cam:

I have the same vibe, similar lift as you. Try putting it in 4WD on a straight road, if it goes away it's the driver side axle needle bearing. I'm going to try and see if the TSB fix will solve this issue for me as this lift is the same as the TRD Pro so it shouldn't be doing this. Your truck is still under the powertrain warranty and the differential is covered by it.

 

^^^^^ this. I totally forgot about the needle bearing issues. Either way it's not a "normal" thing and will need to be adressed

 

Worst case if the TSB bearing only works a few k, you know you can do the work to do the ECGS bushing. That's my plan anyways, though I have until 100k to figure that out.

 

Wrong, they are not struts. A strut is not found on a vehicle with a LCA and UCA, a strut is a structural part of the suspension on a vehicle that uses a lower control arm only. ( See diagram below ) Our trucks have both lower and upper control arms and simply use a coil over not a strut.

 

Wtf. you guys do this the hard way. Disconnect the spindle from the upper control arm. Disconnect swaybar. Unbolt bottom of shock from lower control arm and at top. Pull out the shock and coil... wtf. Why remove the cam bolts and lca?

 

Ya I have that vibe. and it goes away when it's in 4HI......guess I'll be calling the dealership today

 

Exactly what I was thinking.

 

This is why on this video here ==>

https://www.youtube.com/watch?v=5E6u7dC7EHg

 

Oh, yeah - that's right (duh). He was only changing the shock. Pays to read. lol

 

I just installed a 2" OME lift took it in for an alignment and guess what My LCA bushings are seized. I am spraying PB Blaster on them for the next week and will take back to the shop. Very frustrating........Wish I would have know this before I did my lift would of had this checked before hand. Now I need to spend more $$$$$$$$$