drive train vibration

So my S90DL was making some clunking noises from the front under hard acceleration and while turning, I got under the car and noticed the CV boot was torn, all the grease slung out, and was certainly the issue cause of the noise. Tesla took the car and diagnosed the same thing, but said CV...

I am getting a vibration above 70 mph from the rear drive train, which particularly manifests itself when accelerating above 60 mph. I know that it is impossible to definitively diagnose something like this from just describing it. But, I am wondering if anyone has had this symptom before, and...