Differential fluid change for off-road package

[PGTB]

It is about time to change my diff and tc fluids (40,000 miles). I have a 2024 1500 Limited with off-road package and 3.92 ratio. The rear diff has the factory locker. Is there a specific fluid and/or additive for this set up?

 

[joesstripclub]

I'm not super familiar with the new 1500s, but I thought the only truck with a rear locker was a Rebel (I might be thinking about 2500s). Are you sure you don't have the standard limited slip? Either way check your owner's manual but it should take a standard gear oil with friction modifier, likely 75w-90.