2006 g35 m/t trans noise!!

[m3summ]

hey guys, when i shut of my 06 g35 manual trans, with the clutch out and car in nuetral i get a rattling noise from the trans. it sounds like it would be in the clutch assmebly and the rattle does not occur if i shut the car off with the clutch in. has anyone else experienced this. the car just turned 1,000 miles. the rattling is worrying me, the car goes in on tues. to get checked out. i have pretty much babied the car since ive had it. any input is greatly appreciated.