So today the G37 started banging into gear up and down out of nowhere. it would not shift out of 3 or 4th gear unless in manual mode. It also seemed to lurch forward when slowing down to a stop. Pulled over did a ecu reset and it drives nice as pie now. I’m lost lol

 

So...since this happened the G had been shifting better than it ever has. No bumping down shifts and much less engine braking. So weird but I like it. Maybe something was plugged and using the manual shifting unclogged it. No idea