> yea, it's awesome, super smooth acceleration from stop to highway speed

TBH, I have heard that a small number of those JATCO transmissions didn't shit themselves soon after the warranty expired; congratulations :-)

I've got the exact transmission in a Renault SUV (2.5 NA petrol engine), and at 160000km the belt started jittering. Not noticeable to the passengers or driver, and no codes thrown up on the dashboard, but the OBD2 tool I use shows that the belt was, in fact, starting to fail.

Those CVTs were fucking terrible for years. They were so bad that loads of them ended up on buy-here-pay-here lots after the transmission blew and the Altima is now widely known as the highway missile of choice for drivers with a credit score in the 400s and no insurance. You lucked out.