It stops after about a minute or so, but I have been getting that throw out bearing chatter noise for a while. When I go from 1st to 2nd at low rpm it just rattles like crazy.
I am going to have to take a closer look in the morning. Wake my girlfriend up have her yell at me for 15 minutes then have her crank it while I get under the hood.
Looks like it the clutch when cold I noticed that the noise is louder. Afer a few seconds the sound gets lower then when I pump the clutch the sound gets louder.