2008 transmission whine

Hello, new to the forums but have been following the site for a while. The site has been very helpful. I have an 08 base, 65k miles and have a slight whine at lower speeds (seems like transmission), is this normal? It's done this since I purchased the car at 60k miles. I've done a 1x3 trans fluid swap so far at 63k-made no difference in whine. I used honda dw1.

I tried searching and didn't find what I was looking for. If there is a thread could you post the link?

Also, is there a link to a DIY for trans pressure switches? Found one for 04-06 but not 07-08.

Thanks everyone for your help.