Mine just showed up with the 21N08 and I still have the 21B10 showing. I wonder if getting the 21B10 is worth a shot now that I have the new update. Not sure why they need to program the transmission to get oil pressure in the cam phasers anyway. My 10R80 shifted like crap when I first got the truck, but I am either really use to it or it has learned my driving style. The easiest fix for the cam phaser rattle is just to auto start it while you're in the house listening to music.