My 2020 GT Automatic makes a strange noise when it upshifts. It unusual as the shifting works fine, there doesn't seem to be any problem with that. But there is a low rumble/shudder that recently started that is fairly noticeable. I did try to make a video of it, but you really cannot hear it over the sound of the car while it is driving.

I don't know what to do. The car drives perfectly, but there is something wrong. I have a second one, same model, same year, which does not make the...

2020 GT Upshifting causes strange rumble/shudder