When the clutch is released, with the car in neutral, the tranny makes a loud continuous, and RPM dependent sound. When I push the clutch in, the noise winds down and stops. That tells me that is probably a bearing somewhere on the input shaft of the tranny. If I put the car in gear and get moving, the noise comes back as soon as I let out the clutch, and winds down again if I push it back in, coasting.

I changed out the throw out bearing, which was cooked.
Everything is back together, but the noise is still there. It is not screechy, but it is loud. Could it be the pilot bearing? (I know, I should have changed it while I was in there) or another bearing, inside the tranny? TO give you an idea of how loud it is, the car is a race car, with very minimal exhaust. I can still hear it when going slowly...

How long can I drive it that way? What could I be damaging?

TIA

 

anyone?

 

Classic input shaft bearing...its not too bad to replace if you are mechanically inclined with a bit of confidence. It may start leaking oil past the seal in the bellhousing and will get louder. Slowly damaging all the gears and other transmission parts. What tranny is it. If its a dx or similar then it may be worth getting another one cheap.