Torque Converter Blackmagic "is it stalling me out"

@Bobzilla are you familiar with how the ecu disengages lock up on a 46RH when braking?
I am more familiar with RE models as well, and there is a stop lamp switch input to the PCM that will disengage lockup as soon as you step on the brake pedal enough for the input, and it will stay disengaged the entire time the brake pedal is pressed throughout the stop. It will ignore TPS input while brake is applied, or to say it will use brake input first.

The RH does have the stop lamp switch input to PCM as well. I have a 93 truck manual but it may not be here with me. I cannot find it.