I’m in the market to upgrade our twin stick R model to an automatic granite dump. My dad drives it most the time and as he’s aging I’d like to make daily life easier on him. Looking for a used granite with an Allison but have heard mixed things about these newer emissions trucks. Is there a certain year range that’s better than another? For example 2014+ has less issues than the 2013 and older? Thanks for any help I’m more of an equipment guy and don’t know much about these trucks.