The Defender handbook states
"Gearbox extension shaft to transfer box" - Weicon Anti Seize Standard Grade or equivalent.
I presume this is the shaft being discussed. If so this indicates that the shaft should not be fitted dry.
Commiserations on your mishap but I'm glad to see all is well again. It should not have happened in the first place but hopefully the drama is over now.
A number of years ago I lost all drive on a 200 tdi 110 station wagon while about to take off at traffic lights on a busy junction. I'll leave the rest to your imagination.

