P2723 is an incorrect ratio on an apply clutch while the off going clutch hasn't fully released. Tie-up. Could be speed sensor, transfer case, voltage to the trim solenoids or bad clutches. You're not helping at all.
The K is a performance converter that is very streetable. It will stall about 2400/2500. It needs power to couple. Driving it like an old lady on the street will keep it in torque multiplication ( slip ) and that can not be helped. There is always a trade-off and that's just the way it is. The...