I was trying to find something here that talks about when to replace differential fluid (front and back) on the 2020 Ascent but didn't find a direct answer. When I google it says it could be between 30,000-60,000 miles (48,000-96,000 km). But the service schedule I have that came from Subaru seems to say it is a service type D and only at 100,000km. Seems to be a wide range. Does anyone have a more definite/exact number of km. as to when to replace the differential fluid? Thank you.