Sounds like a converter issue. So, let's start with checking the fluid and that will tell us if we have a burned-up clutch.
Here is a guide that will help with this:
https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Once we know what the fluid looks like we will have a better idea as to what direction to go.
However, your comparison to a manual is spot on.
Basically, what happens is the converter is no longer able to multiply the torque in order to move the fluid effectively so that the transmission will start to move the vehicle.
I suspect this will lead to a converter replacement, but we need to start at the beginning and go from there.
Thanks
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Tuesday, June 14th, 2022 AT 12:57 PM