I have a 5 speed that i noticed didn't roll back on the slight hills like it used to in neutral. I had recently changed the rear pads and noticed that one of them was snagging every turn on the rotor. So i figured its a warped rotor, replaced it, and readjusted the E-barke screw. Everything worked perfect for a couple of weeks. Now back to same problem....rear brake snags enough to keep me from rolling back. any ideas?