Ok Strange problem this morning. Car is a 3.6Tdv8 2008 144,000 Miles on the clock has had Transmission fluid changed in Jan and new torque converter in April has been running fine. This morning i noticed the revs drop to idle when i put my foot on the brake to slow down, like the gearbox had gone into neutral. I also noticed that is wasn't keen to go back into gear and the D indicator on the dash had disappeared for a second or two. It was not replaced with N or anything else just blank. Switched the gearbox to manual mode and it was fine changing as it should. Any ideas?