Fluid Maintenance Questions 2021 2500 w/68RFE and Anti-Spin

[rfullen280]

Good Morning,

I have a 2021 2500 Cummins w/68RFE and Anti-Spin rear axle (SRW).

What "additive" is required, and how much?
How much of each gear oil for the front/rear diffs?
How much ATF+4 for a pan off fluid and filter change for the 69RFE?

I've got 60,000 miles and I tow 10K pounds for about half of the time.

Thanks!

Rich

(Also, I've searched fluid change, diff, trans, etc...haven't found a good single source).

Does the trans pan have a reusable gasket? Anyone make one?

 

[AH64ID]

I used Amsoil Severe Gear 75w-90 in my 22 with anti-spin and didn’t need any supplemental LSD additive.