This relatively simple procedure is fraught with problems as it involves potentially moving the pinion position and causing my nice quiet diff to become a howler.
I would have preferred to leave well alone but as it had a weep it could not be ignored.
The manual calls for initial measurement of pinion bearing preload followed by replacement of the pinion nut with a newer type of nut but I have stuck with the original old nut for a number of reasons which I will attempt to explain.
Here is...