TJ/LJ Rubicon Diff oil

[ThinkMud]

gonna be ordering some Solid diff covers soon and was wondering what diff oil i should use for the LJ's Rubicon axles... the rear is a limited slip with the air locker, front is open with air locker. Not sure I need the additive or something?

I usually run Royal Purple.

Any ideas/recommendations?

[richs347]

If you run the Royal Purple, get the 75W140. Each diff will take 2 bottles. You won't need the extra additive with the Rubicon. 1st, the additive is added in already with RP, and 2nd, the locker design doesn't have the clutch disks that you would typically need it for.