What is the noise in the front end of my 1999 Dodge Durango?

[Jeff B]

I noticed that when I came to a complete stop and then let off of the brake my Automatic durango didnt go. I thought something was wrong with the brakes so I had them all replaced. it still is doin the same thing like something is caught up or stuck, and now there is a rubbing noise coming from the front end. We thought it was the dust shield and bent them back,no luck. We thought maybe we was wrong and it was the rear brakes and checked the emergency brake, no luck. Now with the rubbing noise, it stops when you push in on the brakes and is only noticeable when you are going slow. The slower you go the louder it sounds. The front end doesnt vibrate and it drives pretty straight, I havent noticed any pulling. Now when you first begin to drive it, the first stop sign I come to it seems like I have to push the brakes to the floor to get it to stop and then the brakes lock up, after that the brakes work fine the rest of the day. I have checked brake fluid and its up to full. what could this be?