I believe there is a rattlesnake hiding under the beast.
After looking under the car at the exhaust system we determined the snake was not hiding there.
We did find it had eaten one of the bolts that hold the transmission to the car. We fixed that and continued the hunt.
Opened the inspection port and looked behind the rubber damper found nothing not even droppings.
Started the engine while the car was up in the air and heard the rattle in the area where the Tork tube meets the the transfer, looked in the round inspection hole at the joint with the hex nut in it and heard the snake rattle again, hiding somewhere inside.
Gentlemen please help me hunt for this snake before she bites and kills the beast. Lovely old thing that she is.