Wife and I DoorDashed 12 hours the other night, we entered one driveway that was pretty steep and I parked at the top and waited for her to deliver the food. Once delivered I threw er in reverse and continued our dash, one thing I did notice when we got to the bottom of the driveway was a rattle and pop noise. I did a quick google search and figured it was the heat shield and kept driving the next day my wife needs to drive to town and the rattle and pop is still the same but about 15 miles down the road the car starts shaking. She slowed down from 55 to about 40 and the shaking calmed but didn’t disappear. You can feel the rattle and vibrations from inside the Prius, especially when you rest your hand on the center console. This Priuschat website won’t let me submit a link to a YouTube I’ve posted unless I’ve posted on this forum more than 4 times and have been here over a day long