Just re read an earlier post re diff seals. (KevinW )
I misread it to be the pinion seal which is the one I swappped. When I finally filled the diff with oil it leaked even worse. This was an original leather faced seal that was soaked in oil etc. So I just had to swap out again for a rubber one from John Gordon Jaguar. Not leaking now, just hope the bearing preload is narynuff. Hopefully will find out next week when my new motor fires up.