I am not sure you can get the seal out because of the "C" shaped diff mount (left or right side hanger paws) overlaps the seal just enough to be a PITA... as in just pull the diff and do all of them. ( 3, in and outputs)
I could be missing something in the translation ... But couldn't do it or figure a way. To fix this from being a problem I plasma cut the "C" opening a bit bigger when the diff was out making a guide out of wire to follow. See the "C" overlapping the seal below. I wasn't going to mess with it. Another Humv bad design "gotya"
NEXT With Diff out clamped guide wire for cutting
Cut a bigger "C" about 1/4 inch out.
Clean it up and do it on the other side.
Now...if for some reason they need service... no more headache
Rebuilt all new with special tractor green paint to hold in all together.
This is what you want to see on the inside.
I would also note... while out take a peek inside. There's a lot of wear points inside the torsen Diff's. Take a look >>
So... What's in your diff's ????
I think... well in my case, was a problem for in rig service. NOT any more, CAMO
Picture worth a lot of words.