I've worked on Aisin Warner trans a good bit as I've rebuilt them for my Samurai crawler I did a 2.0l turbo swap on. The 300 series has 3 solenoids with the 2 gear select and the lock up. I see the 442 has a 4th timing solenoid. I'm curious as to its function as I wrote a manual shift control arduino sketch a while back for the 300 series.