2017 Lonestar Vibration

I have been experiencing intermittent vibration from the floor of my truck, the side mirrors shake, and at some instances it feels like the entire cabin is shaking. I do not feel any vibration in the steering wheel.
I have already got the driveshaft work done and replaced the steady bearing, got the wheel alignment and balancing done (twice). Took it to international, they did not find any thing wrong. I also got the ride height checked and it was slight high, so they adjusted it to spec and that did not fix the issue.

My hopes in posting this message here to see, if anyone else out there has experienced these symptoms and if they were able to find a cure for this problem.