Moly suppliment for tranny

I've used additives in my manual trannies for years. I found a moly additive that makes shifting "butter" smooth. However since this is my first foray into 4x4's is moly ok for this application?

Also can this be used in a diff...mine are open diffs (ie: 4 cyl, 4x4).

 

man i wouldn't, not yet anyways. you got an 09, if you ever do have tranny problems you know they're gonna blame them on that

 

Yeah, I thought of that! In the past I did this only to older vehicles. I was just wondering if it would be a problem with 4x4, or not.