From the parts supply aspect, yes I do know quit a bit about M40/M41 and the M400/M410 and to some extent the M45/M46/M47 transmissions, but the hands on rebuilding expertise belongs to my brother who regularly rebuilds our manual transmissions.
And of all of those, the M47 is the one we have no direct experience rebuilding.
I do know that an M47 has mostly M46 parts, but of course there are differences. And the availability of M45/M46 parts is limited too. Synchros are NLA from Volvo and can't be easily had from any of my sources and the M47 uses 5 of them!
I also know a special tool is required to safely remove the rear housing or bearing on an M47 and we don't have that tool yet. However, my brother is quite adept at fabricating tools on the rare occasions we are need of one.
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Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502 hiperformanceautoservice.com or oldvolvosonly.com
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