[Justamessenger]

Every other year at oil change, if you replace 1/3 or so of the transmission fluid via drain and fill (3 quarts for my Infiniti) at the same time, what does it cost you? $25 and a few minutes? That way, you would have done all that you can, and you can focus on bigger problems.
P.S., unless you don’t have a drain plug, the pan can stay right where it is.