The dealer ended up doing the fluid flush/replacement without using the flush machine. The guy in charge of the Nissan service (The Place is a Nissan/Audi/VW Dealer) said he had not seen this letter since his service manager was gone on vacation and hadn't passed on the info to him.
He said they will no longer use the flush machine on Titans after reading the letter issued by Nissan.
They ended up doing the flush/replacement as described in the service manual, which involves removing the coolant line and pouring new fluid into the charging line until it comes out of the cooler line the same color.
The procedure from the service manual was posted before.
Who's changed their own tranny fuild? All of it.