Who has changed their transmission fluid?

[racermp]

was the fluid dark?

it wasn't totally dark but it wasn't clean blue either. it was more brownish

 

[DustyB]

I am a bad person. 2018 CX-9, nearing 160,000 km. Never had new transmission fluid. Never had rear wheel AWD “differential” fluid changed. Am I in “now or never” territory? I’ve read doing it/them at higher mileage is inviting problems. Should I leave well enough alone?

I've got a 2018 CX 9 with approx 154K. I changed the PTU and rear diff fluids at 150K - and plan to change every 50K going forward. Super easy to do. I will be doing a drain and fill on the trans next week. No filter change. My belief is that if the component is working properly then changing the fluid shouldn't do any harm but never changing that fluid is asking for issues. I don't believe in the lifetime fluid theory.