The Stovebolt Site Forums The Shop Area Driveline Overdrive electrical question

From an old BW service manual that I have:
When operating in overdrive, the driver may require the return to direct drive without reducing the car speed below the cut-out point. If the accelerator pedal is pressed down beyond the position corresponding to wide-open throttle, the stem of the throttle (kickdown) switch is pressed, thus opening that part of the control circuit between the governor and relay, whose contacts points open, de-energizing the solenoid, the outer spring of which urges the pawl toward release. Due to the fact that the engine is driving the car through the gear train, the pawl is pinched by the torque reaction and cannot release until the driving torque is removed.
That's kind of a long winded version but yes, once you engage the KD switch it will hold the transmission in the lower gear until you let off of the gas.
Fred