I have a 4l80E with the transgo kit that eliminates the electronics and makes it a manual shifted transmission. it uses a th400 vacuum modulator to control line pressure so that you have normal shifts under light throttle and firmer shifts as you get into it. it has a billet lockup converter with a 2800 rpm stall speed and of course the lockup clutch assy. I need to figure out how to manually lockup the converter when cruising but i'm not sure if the lockup solenoid takes a constant 12 volts or if it takes a different signal. I don't want to ruin a 1000 dollar converter or hurt a spendy tranny.