Got a strange noise coming from I think the gearbox. Only really notice it in fourth or fifth at very light throttle around 2500rpm. Gets louder if you push on the gearstick. I dont think the sound disappears at higher rpm/ more throttle it just gets drowned out by engine and exhaust. If I push the clutch I can't hear it. Maybe it's the clutch.... Any thoughts.

heres a clip,motorway in fifth. I push the gearstick at 6 secs and 11secs and you can hear it gets worse.


https://www.dropbox.com/s/mmyfhaizm8rohuk/Voice0003.aac?dl=0