Rear differential temperature

Change the oil in diferencials. I change mine every 200 k . No issues.

 

I have a 2016 international with front rear running on average 195 under heavy loads. The rear rear runs 175 under heavy loads. Always been that way for the past 5 yrs I've had this truck. I currently have 846,408 miles on the axles. There are some shavings starting to show in the rear rear. I use a temp guage to keep an eye on both axles.