The window had popped out of the rear track and it was stuck down. I was able to pop the little ball thingy back into the rear plastic piece, and it is now working , but it goes up funny... I appears as if the top of the the front plastic piece is broken so it is not getting good lift all the way throught the raising of the window. it goes down fine... so I am guessing I need to replace that plastic piece... my question is how difficult a job is it? are there any good references online to step me through the process? thank you all in advance.