Driveline vibes excessive or otherwise are bad. If they exist, they remove your ability to diagnose when your u-joints are dying, about to die or are dead. They also remove your ability to tell when something is wrong other than a dying u-joint like a driveshaft out of balance, improper pinion angle, loose trans mount, or a myriad of other issues that can lead to catastrophic failures like this one.
If all that happened is what you show which is a busted mainshaft in the t-case, consider yourself very lucky. Typically the shaft swinging around takes out the exhaust, fuel and brake lines, fuel pump wiring, and puts a few holes in the tub for good measure.
I will tell you right now that the chances of you being able to re-use that driveshaft are about 1 in 500. They don't respond very well to being slammed against anything and will either bend or be out of balance.
You need to take a much closer look at stuff and see if anything else is damaged.
At the minimum, you are going to need a new driveshaft and new tailshaft for the t-case and I'll be very surprised if the tailcone and bearing are still good although chances are good they could be.
I am Savvy
Knowledge does not equal understanding.