Thanks for the update. I may crawl under the car today to check on the heat shield and then do a tranny drain and fill this weekend. What’s the mileage for when the manual calls for a normal change in tranny fluid? I’m assuming not until like 100k, right?Update. Just posted 2 or 3 paragraphs on another post about this so I'll make it short. Visited different dealership. Completed 2nd tranny drain and fill. I typically to 2 or 3 max back to back every 30k miles to keep fluid fresh there. They also drained and filled differential. Service rep said the car had loosened heat shields and they tightened them up. Problem solved. No more buzzing. It's hard to believe that other technician (previous dealership) did not catch the loosened heat shields although I mentioned the buzzing to them. Now since it is gone, I feel if it wasn't the heat shield, maybe the differential drain and fill helped or 2nd tranny drain and fill?