Hi Friends, I guess I'm due for a drive shaft replacement. I have a good bit of slack at the joints {mine and the RTV's}and a good bit of rattle too. 1414 hrs. I had the improved version installed at 600 hrs under warranty. If I hold the shaft still and wiggle the joint, It will pinch my finger if I put it onthe "cup".I will price one tomorrow. It looks like a job I can do. Maybe a matter of removing the pin and going from there. I would guess that the cast iron in the yolk has worn down as well .Any advice will be appreciated. Thanks, Bordercollie