46RE ticks in all gears except reverse

This is very interesting. It might have ticked later in the day when you pulled the cable because the fluid was warmed up and thinner. Was the trans cooled down by then? Did the outside temp increase significantly? I wonder if you could jack the pressure regulator to fix it? I believe that it is pressure related. Reverse operates on much higher pressure; whereas forward pressure is governed by mph. Does this trans behave normally in reverse and all forward gears?