I gotta do this at some point in the next week, dont wanna be buggering my diff if it starts to get low on oil.
Helped a mate do it once on an old disco, we had to lower the motor onto the ground and use a breaker bar and trolly jack to undo the flange nut, let the weight of the vehicle do the work for us (saw someguy on LR4x4 doing it this way in the tech section and it works well, as long as your sure your using the right size socket, easy to strip the nut with all that toruqe on the breaker).