Dusty, the slip yoke design at the rear of the tranny has to have some movement...
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Look at the tranny rear mount to see if it is worn or loose.
Look at the driveline to see if the balance tab (if it has one or had one) has fallen off.
What does the gear oil look like in the differential?

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!