oscillations

Hey everyone! Been having issues with my vehicle since the single turbo setup was complete. I have been reading through reddit's, forums, and many other websites but their is no definitive answer for my issue. I'll explain the setup the car is running to get you guys some more insight along...

Hey Everyone, I just developed a vibration when coasting from rear end. Tested in neutral and does it too. Applying brakes also has this sound. Basically anytime I decelerate in any manner it has this sound...see video to hear. Anyone had this before? I changed guibo in case that was the cause...