Hey guys I had a question regarding the transmission fluid change in my 2009 infiniti g37xS. I have about 117k miles on my car and have had the car for about 6k miles. I’m not sure whether the previous owner had changed the transmission fluid or not. I know infiniti states that the transmission has a “lifetime” fluid, but I’ve heard people say that you should change it, however I’m afraid that since the transmission fluid is already probably dirty, changing it with new fluid will cause slipping and further problems in the transmission. What do you guys suggest?

 

Lifetime is 100k miles. Do drain and fill not flush