After cleaning off my differential and driving for a while, I realized that my gasket was leaking not the seals. I was planning on dropping the entire cage to get to the gasket but my real Jag mechanic said I could just unbolt the cage and then tip it backwards. So I unbolted the 4 suspension mounts and then was able to drop and tip the cage and get full access to the rear cover.
Just posting in case someone else has a leaking gasket and thinks i like did that the whole cage had to come out. Hardest part was actually removing the rear exhaust pipes.
Last year, I worked on a friend’s 1967 E whose gasket was leaking badly. Tightening the bolts helped a bit but it still leaked.
I ended up cleaning it well with Brakeclean and then slathering Permatex “The Right Stuff” on the gasket exposed seams and over the bolt heads.