I read through everything in the thread. In fact, read everything in about 5 different threads, and the endwrench site. There aren't really any insights into when, how fast, reasoning for the different things. I'd just take my best guesses and then check them if I just knew what each thing actually does, but I don't know. The best descriptions I can find are simple things. I can't really duplicate programming for "open, smooth and lock-up" of the lock-up clutch if I don't know what the duty cycles and purposes are for the three settings.
I thought i explained how things worked.... but a long thread who knows. What i will tell you is expect that the tranny wont last for the life of the car with just home grown paddles. Youll be bypassing everything that gives the tranny long life.
google endwrench transmissions and read up on it there.
Actually lock-up and overrunning I have a bit of a grasp on. The line pressure is what I have no idea about.
As for reliability, I don't care. I hate the 4EAT in my XT anyway. It's a terrible transmission. I plan on putting in a 5 speed manual eventually. I have a Bachelors in Electronics Engineering and just want a fun project to work on for now since my job is not in the field.
I kind of figured SS 3 might be a 100% kind of thing to just gimp by. I'm hoping to find out when Subaru does or doesn't engage it to give more normal operation, but maybe not. Meh
These are my thoughts based on what I read.
The overrunning clutch is for engine braking. If SS-3 fails Subaru says there will always be engine braking but does not mention any other bad effects, so for paddle shifter I think the overrunning clutch should always be engaged.
I have seen aftermarket controllers simply control line pressure DS-A using throttle position.
For lock up DS-B I have also seen aftermarket controllers create a "5 speed" where "5th" gear is 4th with the torque converter locked up. Otherwise the torque converter is not locked. When locking up DS-B should be modulated for a smooth transition.
For PC they have soundcard oscilloscope software, maybe this is good enough for your needs, and not sure if Mac has that option. I'm using a HP 54600B I picked up for $75.
Where have you seen the controllers? I'd like to read up on them and see if they can explain why. Like mentioned just above, this is the part I really don't understand.
I believe it was Nipper that said leaving the torque converter unlocked would kill mileage, and I tend to agree. My thoughts for DS B were to keep it locked until you shifted or took your foot completely off the gas. No idea if that good idea or not though.
And where did you get an oscilloscope like that for $75!? Those things are worth multiple thousands.