Originally Posted by
HumanMode
It does sound like it was a simple miss of the torque converter, as you hypothesize. I don't know when the car had its transmission fluid and filter changed. It may never have. It might pay for me to get it done?
As Jim wrote regarding his own story about the transmission going into limp mode, his experience is better than my speculation. I will say it might be worthwhile to have your filter and transmission fluid changed.