Nah, not violently shaking at all. More of a grumbling pulsation that rhythmic.
Main concern was just snapping or dropping the driveshaft somehow, but I don’t see how that would happen. Likely would just keep doing what it is doing, either from the angle being off slightly or wobbling in the tailshaft from a worn bearing.
This will be remedied soon, because a very prolonged period will slowly wear on the front ujoint or both over time.
