Never had this issue before, but noticed it when getting ready for snow this week.
the arms for the 3 point hitch were "twitching" when I raised them. At this point zero load. Brough them up and I saw them slightly fall then go back up. When I put the weight box on it would raise then drop 1-2" and then raise again. Tractor starts to buck...
I can stop this by locking the rate of drop control valve.
Any advice before I take apart the rock shaft? I was hoping to avoid any major work in the cold/winter.