Transmission? I just replaced mine, and the new one shifts wicked hard. Here is the thing, they gave me a 2018 QX50 as a loaner while my 2006 G35x was being repaired. That new car was nice, but shifted the same way. To me, I would think after time it will wear itself down. A lot my cars died on trannies, Volvo 960, Honda Odyssey, Honda Accord, Infiniti G35x, Chevy C30, Pathfinder pile of human dung.