Hi there from Norway!
The Jaguar rear axle on my '34 leaks oil in the front (where the drive shaft is attached)
I have bought a new seal, a the circle formed one with rubber on the inner part vulcanized to the metal outer part.
Is it easy to change this seal? Just loosen the big nut in the centre of the yoke, pull out the yoke, replace the seal and put it all back together again?