Started to notice after parking on a hill. (see another thread)
I remember meeting this problem in a previous MOT. I have replaced the drive shaft seal from the back of the transfer box, but there is a half inch gap all the way round between the seal and the shaft. It would seem there is something missing. That seal is never going to seal anything.
What is missing? From looking at the Landrover green repair operations manual page 37-20 diagram 1RC163, that is exactly what I have - there is a gap there too.
What is it supposed to seal against?
Any ideas?