I had 75,556 when I did the change out, I did a drain and fill when I got it at 42,XXX. I drive in a lot of stop and go base traffic and light offroad/mtn passes almost every week on some adventure or another, fluid was dark brown.
My 3-2 downshift under medium throttle was basically a huge thump, and my 4 to D upshift was inconsistent sometimes it would shift normally other times it would just stay in 4 so I would have to manually shift to 4 then to D to complete the shift. I have not been able to replicate those issues now within a couple hundred miles, I would experience one or both of these phenomena daily. Other shift points, subjectively, feel smoother overall.
Based on my driving habits, I think I am going to do a drain and fill every other OCI which would be every 30k.
Today I will begin a series of drain & fills on the power steering system with Amsoil "ATF"