Occasionally the car will make a "thump" when the automatic transmission shifts.

What is your question?

This "thump" sound usually occurs when the vehicle shifts suddenly, such as resuming the cruise control, or when the car automatically shifts gears in the Drive gear at speeds over 60mph. It has happened at very slow speeds when the transmission shifts gears automatically. This is an intermittent occurrence, not happening all the time. It is not a metallic sound, just a "thump" moderate sound.