I would like to consult you on the following matter.

Namely, the Crossfire user manual states that the automatic transmission oil should be changed every 129,000 km. Since my car has covered a total of 216,000 km, and unfortunately I do not know if the previous owner ever changed the transmission oil, the question is whether it makes sense to be interested in this at all, or is it better not to touch it, since the transmission is working properly?

This question arises because I read somewhere that if the transmission is working in a 20-year-old car, it is better not to touch it...

What do you think?