Hi, Scotty I have a challenging situation. I changed the transmission fluid in my 2015 q50 Infiniti Now i am having a problem with the shifting. I took to Aamoco and they stated the level was fine but the only solution they offered with a total transmission rebuild which seems absurd brand new tranny is 10k used is 3600! I dont know what went wrong. I used automatic transmission fluid full synthetic there is no filer or gasket replacement on q50. The car still runs but not well. Looking for guidance thanks.