Electronic Locking Differential Fluid Change

[RhinoZ24]

Alright guys, my girlfriend's mom's 2007 Expedition needs the rear differential fluid changed. I don't have the exact axle code, but I know she has an electronic locker and I'm almost certain it's the 3.73 rear end. My question is fluid. I know for non-limited slip you just put in gear oil, for limited slip you put in gear oil mixed with friction modifier, but I have no clue what to use for an e-locker. Any input as I told her I can change it for her once I find out what additives to put in the gear oil. Thanks in advance.

[Jersey_Joe]

Ryno. I have no facts in front of me to prove this. So no I didn't google it yet. Lol. But I think u need the lim slip fluid in that rear. When I get some time ill double check. But off the too of my head. That's what I'm thinkin

[RhinoZ24]

That's what I was thinking but want to be sure lol. And alright awesome thanks Joe!