 Drivers Side window issue
I have a 2001 ford ranger 4.0 4x4 with electric windows, on the drivers side the window seems to be messed up. it will role up and down fine but if it were working normaly even if you held the button down once the window was up it would do nothing, but now if you do that the motor just seems to spin. Also another issue that it has is that if you hit a bump or go over train tracks the window seeems to slide down and you have to role it back up. and also when it is roled up it doesnt seem to role up all the way it just seems to role up a tad short of being fully roled up. Any ideas as to what it is and how to fix it? | 
