If you do have to drive it and don't wanna crawl under to wire the kickdown level 50% or more in-towards the rear of the car, then you better drive it very softly..like no more then 5% of the gas at anytime or speed.
The kickdown level increases and decreases the oil pressure inside the trans. Thus the more oil pressure the firmer the clutches hold and the later the trans shifts gears. That happens as you step on the gas, the deeper your foot goes to the floor, the higher the oil pressure is inside the trans so the clutches don't slip and burn up. when you lift off the gas the motor makes less power and the trans clutches need not to hold as firm.
So right now the trans thinks the motor isn't getting any throttle and is just stop. That is why you should not drive it, the more gas you give it the quicker those clutches--and bands will burn up. You could ruin the trans in mins if driven hard.
