transmission problem
 

Hi my name is Syd and I have a 96 Civic EX w/ a manual tranny. For a
few weeks now ive been hearing a wierd noise from my engine bay, like
a whirring noise, but when i put my clutch in, the noise dissapears.
the problem is on and off, but now a major problem has occured. I went
to start my car the other day and it starts fine, but i cant put it
into any gear at all, and when i try, the gears will start to grind.
when the cars off, i can put it into any gear i want with no problems.
Theres plenty of clutch fluid and the clutch pedal goes up and down
smoothly, so i have no idea whats going on.