Needing advice

Hey tacoworld thanks for the add, I'm needing advice from some gurus figuring out this vibration.

I have a 2013 Trd sport, I have recently replaced all shocks with bilstein 5100s. The front is set on the 1.75 setting with stock coils and 1in blocks in the rear. I have done the ecgs bushing upgrade, ome carrier bearing drop and diff drop. I replaced my carrier bearing with Toyota OEM part along with the ujoints. The tires I am running are atw3 275 17 that have been balanced and a front end alignment has been done after all the front end work. I am feeling a vibration in the seat at about 30mph and slowly fades at about 55. Not sure at this point what the culprit could be. Please help

 

Do your rear blocks have an built in angle? Rule of thumb is 1 degree angle per inch of rear lift.

 

Remove the diff drop for 1 as it's not needed on 2nd gens, Does it go away in 4wd? And who did the U Bolt work?

 

Yes they do have a slight angle built in

 

Carrier bearing shim could help as well. Throw a washer on as a temp to see if that helps.

 

I did all the work myself. No it doesn't go away in 4wd. I'll remove the diff drop and see if it improves.

 

I have the old man emu spacer kit installed right now. Think it might be too much?