I got a code pcm from autozone also a tcc code

What is your question?

the service engine light was on so i took it there and it is shifting hard other than that its running fine. Do I have to buy a new brand new pcm and can this have anything to do with the tcc code and why its shifting hard? It seems I read here on your site that the pcm controls engine emissions and transmission. Please what do I do first Im lost and confused. the pcm code P0300 & tcc code P2763 Thank U so much