I have a 2003 Nissan Altima 2.5s 5-speed with about 183K miles. I think it still has the factory clutch, and the transmission fluid is at the correct level. The other day I tried to shift into second gear, but when I let off the clutch it began to grind and then threw it out of gear. Since that incident, I have been unable to get it into second gear even if I try to hold the gear stick in, or try it with the engine off.
What could be the cause?