2016 RAM CTD; Can’t Find Differential Service Interval!

There is an asterisk shown in the box for axle oil. It says when frequent towing, police, taxi, change at 20,000. The first change is the most important because it's dumping the break in trash. NO, you won't see globs of metal on the first change but it's the one that is most likely to produce very fine particles. Depending on how often and how heavy you tow you may choose to extend your interval.