leaking justy diff

Overnight the diff started leaking from the passenger side CV.
Anyone know how the oil is retained in these things, and whats the fix?
If Im doing it anyone got a welded viscous???

Cheers,

GTP

if its leaking where the driveshaft fits into it then its probably just the oil seal

Yeah thats what I think but need to know if they are similar idea to the front cv's a push in seal, or an internal item.

Cheers,

GTP