Transmission scraping
 

Hi Guys First post here
My 2010 camaro 2SS manual, has a scraping noise when changing down gears not going up gears, also when reversing this scraping noise is happening, once she is all warmed right up and on the high way this sound seems to go away, I live in rural Newzealand and pretty isolated from mechanics .
If any one has experienced this and knows what the go is that