Thank you for that excellent answer. I would like to add to my previous description by saying that when I push the clutch in the tractor wheels comes to an immediate hard stop. I can only imagine how hard this must be on the transmission. I now understand that the PTO issue and the main clutch might be part of the same problem. I want to invest in fixing my tractor, can you tell me why the transmission would come to a hard stop when the clutch is engaged? Is it all part of the same problem with the PTO clutch?
Thanks again!
As Oaktree stated, make sure your brakes are not dragging and that your parking brake is released. The brakes are mechanical so check the point on the brake housings where the actuating rod enters the cases. There are many issues caused by the rods(not just brake) corroding and not allowing the devise controlled by them to operate