2014 Mazda6 transmission bearing whine
 

Took my 2014 Mazda6 into the dealer because I thought I had a wheel bearing making noise. They diagnosed it as transmission bearing noise and say only remedy is a $5,000 transmission replacement. I called Mazda and they said because I’m the second owner and the car has 70K miles there is nothing they can do. I found a reputable shop that quoted me $2,000 with 3yr/36K mi warranty. However upon further investigation I found this article: https://mazda.oemdtc.com/189/whining...012-2014-mazda

Has anyone else experienced this issue? I found posted in the comments of this article a TSB notice:
https://static.oemdtc.com/TSB/05-005-15.pdf

Any suggestions on how to proceed would be appreciated. TIA.