Define how you want to control TCC? What you could do is the tube that feeds fluid from the 1-2 shift valve, if you add an electric solenoid to stop the flow of fluid, it won't let the TCC valve engage lock up until you turn the flow of fluid back on and it will work the way of the OEM design as disengage on deceleration and hard accel.
OK. I assume you are aware of the mods to control the OD and Converter LU on the A500 and A518 manually. I want to do the same thing on a 904 LU for the lock up function.