Deer 4005 MFWD seal replacement

[steve74]

Anybody know what's entailed in replacing the seal on the front of the differential? Where the driveshaft to the front axle comes out?

I'm looking at a tractor that obviously took a pretty good hit underneath and is leaking fluid briskly from that seal. Might also consider disabling and plugging it - Not sure the 4WD is important to me, just happens to have it.

Thanks