I assume it also works ok in my axles?
Oh lord, $50 a gallon for redlines gl-5. Let' seee, both axles, xfer case, tranny...sounds like almost $70 worth of fluid? Help.
GL-5 is the modern standard for gear oil specs/additives. If you walk into a store, everything there should rated GL-5. You don't need the fancy redline stuff, but it has apparently been known to help with problematic trannys. Simply putting in fresh fluid might help too.
The transfer case takes ATF, not gear oil.