I got careless and bent my Bush hog drive line, just enough to make it vibrate. I'm thinking I will have to replace it and my question is about new Universal Joints. My Trucks and Automobile have sealed U-joints. the Bush hog has grease fittings but when I grease them only some of the bearings excrete grease, the others remain dry. Have any of you replaced your greased joints with sealed joints, If you have which joint lasted the longest time? Thank you, Kerley