'06 Yaris grinding noice

2006 yaris makes a weird grinding noise

Hey Scotty and floks,

i have a 2006 Yaris 1.3l with just 20k miles, but i've trashed on her so the mileage doesn't say a lot. Anyways she's making a weird grinding noice when she is cold under acceleration. When she is up to temperature the sound goes away. How can i find out where the noice is coming from. It could be anything in my book. Engine, transmission, clutch, differential, throwout bearing?

thank you in advance and cheers!