My tranny is making a weird noise from around 4500 to 5000 rpms and i'm not sure if its a grinding or a messed up bearing. I only hear it while the car is moving and the clutch is pressed if i rev the engine to around 4500. I also hear it at the same rpm in between shifts. If anyone knows what might be causing this that would be great. I've got an h23 if that helps. Thanks