To Ozarkdude: Thanks, again. You mentioned "flex couplings". What are those? Where are they? What should I be looking for or at if I am inspecting them? I am sorry, but I am new to the technical world, but definitely love this vehicle and appreciate it enough to be willing to learn. I also will need experience to get started fixing up the 400E I purchased. If the problem I am encountering is related to the flex couplings, what does this entail in terms of fixing? Also, how would I know if it was the drive shaft, and why would the drive shaft do this at speeds of 60 or greater but not really below that?

In any event, correct me if I am wrong, but it is probably time at this point (assuming I make it home tomorrow) to turn my attention to the 400E.

Thanks for your patience.

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CJTucker