I have the worst of Nissan practices that I have ever seen by a vehicle manufacturer apply to it’s business. I have the radiator that intermixed the coolant with the transmission and the transmission fluid with the coolant system. I have isolated the transmission fluid to the transmission radiator and flushed it. Drove it and flushed it twice more. Third flush I replaced the filter. After I test drove it the transmission stuck in neutral and the gearshift slid freely through the indicator up and down until I got it stuck in park. The transmission is still in neutral. What the ...?!?