Kieth, I think you will have to do some pressure tests, from one of your previous post I understand that the truck will travel in rev direction, if that is so you should be able to see a drop in selected pressure when you change direction witch may indicate a failure in the clutch pack. I will consult my notes further and let you know if I have any other info.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.