Rear axle shake/shudder

Alright so this is a two fold post. 1st part is to log for my own sanity what ive replaced/done in search of a remedy. 2nd, is to get some input as to what I may be doing wrong.

So a few months ago my 17 Sr5 hit 100xxx miles. I've decided to do some mileage appropriate upgrades/maintenance. I replaced the stock leaf pack (which had a Icon AAL) with some Skyjacker 2in lift leaf pack. I also replaced the Bilstein's with skyjacker Blackmax shocks (1-3in lift). Initially the ride was super comfortable. Then I added a 1in spacer lift and a u-bolt flip kit.
I now have a very very noticeable shake/shudder from the rear suspension.

I'm thinking the shocks are at the very limit of their down travel but not 100% sure. Any other recommendation's as where to start?

 

Check the angle of the drive shaft. This assumes everything is torqued to spec.

 

^^^^ This. Sounds like you were good until you went back and added the 1" block.

 

yeah i agree. but i also did the flip kit at the same time. planning on doing some wrenching next week over the holidays

 

Hope you are able to resolve it. Nothing more annoying than driving with a vibration or shake!