So I have 2700 km's on this guy, nice car- the shift used to be like flicking a light switch, but now I'm getting what I will call a slight notchiness or slight resistance to shift home- no grinding. Obviously still an oem fill with recommended service at 80k. So wth? Currently looking at GM Synchromesh/Torco/Amsoil as an alternative fill. Northern Canada- cold climate. I haven't checked fill yet but haven't noticed any oil slicks. Appreciate any opinions.