I have owned my 2001 Nissan Sentra GXE for the past 15 years with no clutch issues until January 2015. My car would not shift when at a light until I shut it off. Was able to make it home. I replaced the clutch slave and master and bleed the slave till I was able to shift again. Drove the car for a month till it would not shift again. It shifts when the vehicle is not running but will not shift when the car is running. There was no signs of the clutch going out. Will a throw-out bearing suddenly go out or will there be signs leading to the bearing needing replaced? Need some assistance as I am frustrated in selling the car.