When to change differential fluid?

[TripleB]

Definitely need to get a manual. I am getting three diff answers when to change the front and rear gear oil. At 15 every 25 or at 60

I bought the 2020 Ram with 29k on it and now its 40k.

Anyone know the correct interval?

Thanks.

 

[HemiDude]

Definitely need to get a manual. I am getting three diff answers when to change the front and rear gear oil. At 15 every 25 or at 60

I bought the 2020 Ram with 29k on it and now its 40k.

Anyone know the correct interval?

Thanks.

Third section down: