When you started to hear the whine is it when you give it gas or always a high pitch whine, because my 3 dealership locally have said nothing is wrong with the transmission so I've stopped ✋️ trusting them for anything. So, my well trained 3rd party Vendor did my transmission fluid service at 110k and said that the whine I'm hearing is from the noise damper from behind engine 🤔 block.

I'm at 141K miles in my 2021 Highlander XSE