In my own case, my ex had called today and asked for help. Vehicle is a 2006 Thunderbird V8 3.9L – 4V. Automatic gearbox 5R55N. No problem what’s wrong with ? Car goes off, ah yes. I, give you tomorrow the OBD scanner with instructions. Short analysis by phone. Engine starts in P and N, speed by 750 rpm should be ok after deregulating cold start. Vehicle is moveable in N, so brakes go off, ABS does not complain. Parking lock goes out there goes out in N. As soon as R or D is inserted, the machine is strangled. Oil level gears on site would still be to be tested. But even if too little should not have any propulsion but not choke off the engine. Do you have ideas for possible causes. Think of this as wrongly regulated gear pressure. But I’m not fit at the 5R55N. Thanks Ralla