Let it go for a while , its normal that after pulling, moving axial ,that they have what looks like a leak ,
Wait I had to read your post over again , the rotors do not have seals , but you are probubly talking about the unit [hub-rotor assembly ] if they still had those by that yr.
Is the leak coming from the axial housing going torwards the dif. or off the back side of the hub ? If its the hub then there may have been an issue with the bearing assembly coming apart and undoing the seal on the bearing , if so you need to get apart , pack a little grease in the bearing and if the seal did not get too tore up you may be able to get seal back in place but its most likly that no matter what it will not last as long as if it hadn't seperated . if you can aford it then get a new hub ,
When thing go wrong they almost always seem to go wrong at the worst possible time.