Clunking noise

Question, I had the passenger side rear axle, bearing and everything else replaced because of a clunking sound when driving slower than 30 mph. It stopped for about 10 miles and now it's back again. It doesn't do this all the time, and doesn't make that sound when backing. I have also noticed that the passenger side rear drum brake makes a clicking sound when stopping sometimes. Does anyone have any ideas what's going on here. I was hoping that whatever it was would go ahead and come apart, but the clunking noise doesn't seem to be getting any worse, or any better.