I was having problems with my driver window not going up and down very fast and then stopping all together and the automatic dwn didnt work eso i figured why not take it apart and see what i could brake? i found that by taking the motor apart the brushes where dirty so i cleanded them and the armeture with thiner and air put it back together and it works great even the auto down only problem it works better then the others now gess i have to do them now

 

I plucked a write up for this off another site, it's in the DIY section.