So my passenger side window will not roll up all the way and when it gets about an inch away from the top starts to bounce up and down and makes a knocking noise. The window rolls up and down so i dont think its the motor. Anyone have a clue on what it could be??? And how it can be fixed?

 

Its the window regulator! Its missing a few teeth, thats why it has no problem moving up or down until there. No way to fix it besides replacing it.