Thanks for the info. I found a trailer supply place in Illinois that has a bunch of the hub assemblies on sale for $51. Got one on the way. I checked the other three drum/hubs and they are fine. I did the old hammer test: If they ring like a bell when you hit them, they aren't cracked. I also greased the bearings while I was at it. So in a few days the old rat-rod trailer should be up and rolling again.