transmission gentle thump during morning start
On a colder day, when starting out in the morning, the auto transmission doesn't always engage for the first 5 minutes or so. I put it in drive. Sometimes the car doesn't move. Then if I put it in neutral, after a moment or two, I hear a gentle thump. After that, the car always moves when I put it back in drive. There is no more problem for the rest of the day.
Would this just be the torque converter still filling up with fluid in the morning ? I am guessing that is it. But if that is correct, why is there this gentle thump ? Is that just the torque converter having filled up ?
I am thinking all I need do is rev up to about 3,000 rpm for a few seconds in the morning before starting to move.