[Learjockey1]

Thanks to all for the info. I think the tailshaft bush is worn and may be 90% of the problem. Grease on the joint will take up the .010" side play. I use the Dupont Krytox 215 grease on the yoke splines and I like the Amoil in the U joints. The vibe is not bad, I just notice it. I will do the simple stuff first. Again, to all, thank you for the analysis.