I got 123k on my 2010. Don't believe a transmission drain or flush has been done. Do u recommend a drain according to DIY tho car has 123k? Thnx n advance

 

I would for sure, the 3x drain & fill is the gentle way to do this (vs. a flush) and dropping the pan for a full cleaning would be a good plan.

 

I did it myself with the Nissan Matic S ( $110 for 12 Quarts from Ebay + 7 Quarts from Nissan dealer ($12.5/qt), so definitely cheaper buying online. I did buy the $10 siphon pump from Home Depot to make the pumping a lot easier. The adaptor from Amazon is also a must IMO, there is no one single drop during the pumping through the refill hole. Dropping the pan takes more time, but it is very easy to unscrew the nut. Overall it is nice weekend afternoon project.