If it is loose at the flange on the TC end, tighten that up first!!! There should be NO play at the flange. Then see if your noise is still there. If it is then I would proceed with changing our the U joint or further diagnosis. FWIW... there are lots of good u joints out there, but a good stand-by is still a spicer. If you can get a greasable Spicer then that is what I would use unless you wanted a fancier u joint. But I have seen the Spicers come both greasable and un-greasable.