With the transmission removed from my Defender it was time for an inspection of the internals of the gearbox. So time to take it apart:
And I am glad that I can report that our initial diagnosis proved to be correct. The noises seem to be bearing related, as the front bearing of the secondary shaft is shot, the lower one in this shot:
But best of all is the fact that all the gears and baulk rings appear to be in pretty good condition:
Next stage is ordering the necessary parts, mostly bearings and seals, re-assemble the box and put everything back together. And after that some other (hopefully) smaller issues have to be addressed. To be continued!