1998 Ford Explorer rubbing noise and squealing from right r

I have 1998 Explorer with 188,000 miles, it hasnt had any major work done on it and it still runs great. The problem is, I recently replaced the rear brake pads and the new ones immediately developed a very loud squeal on the passenger side. I took both rear calipers apart cleaned and greased the little aluminum plates that they rest and slide on. I also use some anti squeal onthe back of the pads. The squeal and quieted significantly but now I hear a rubbing noise coming from the rear passenger wheel. It sounds like the pads arent releasing all the way. I don't feel any drag though. Your thoughts?