Ok, today i changed my transmission oil. The first thing i notice about theusedoil has a lot of copper in. I mean basically you can see (i dont know how to explain) clouds of fine copper wear in the oil. I didnt took a picture of the pan when it was full, but here is what is left. You can see metal wear...

My question is: Should i be worry about this or this is normal. Btw i dont think the trans. oil was ever changed. The car has 100k miles.

 

Just changed mine as well, I didnt get a copper look to it but more of a fine silver within the fluid. You should be fine as long as you used the OEM or equivalent fluid like Valvoline Mercon V Synthetic. If its shifting smooth without hesitation, then Id say your fine.