016 Transmission rebuild?

[Tony Hoffman]

Does anyone know if there ever was any supplement to the Bentley for
rebuilding the 016 in the 4000Q's? I've got one with bad third gear
syncro and would much rather replace it (It's a friends low milage
car) than replacing the trans with a used one.

Perhaps someone knows of a link for some info online if there was no
factory info released to the public.

TIA,
Tony