Silverado make a metal cling when going to R,N,D
 

Ok when going through the reverse neutral and drive I hear a metal cling sound why is that happening it's a 2002

Possibly u joints. That's my experience from the situation

???
 

U joints are the parts connecting the drive shaft to the trans and rear end. The look like a x for the most part. They are not expensive and the replacement isn't too hard to do yourself
https://cimg5.ibsrv.net/gimg/chevrol...a06ce7297e.jpg