To give you an update, I did have the Aisin torque converter replaced under the powertrain warranty, and oh my gosh it fixed the issue. So nice to be able to put the pedal down and not have that roaring anymore. I guess the torque converter was the problem! And all this time I've been chasing things like heat shield vibration, ring and pinion out of wack, exhaust drone, etc." I’m going in for a warranty torque converter replacement for my Aisin transmission"
Will be waiting to hear if this cures the issue!!!
For anyone having this issue, this is the service bulletin to show your dealer: https://static.nhtsa.gov/odi/tsbs/2016/MC-10121640-9999.pdf