[Roscoe]

Re-read the answer and look at the sentence after the park/neutral comment...."But that isn't necessarily the same problem. ".....

I am not saying that the driveshaft is THE problem. I AM saying that it could be a number of things. Before I look at the engine I would look at the bellhousing, clutch and driveshaft. If any of these are misaligned they can cause damage to the trans, pilot bearing, etc.