I don't think that Volvo even teaches newer techs anything about MTs anymore. Not much about clutches either btw (even though a fairly simple system). Years ago, other manufacturers (like Subbie) use to teach details about R&Ring the guts of their MTs and way back in the mid 80's, I was even at a Volvo MT class too BUT in recent times, I'm not sure that Volvo teaches anything now to younger guys so obviously, how much could they know?
Volvo also doesn't teach techs much about the inner workings of automatics either YET the same techs are suppose to pass the ASE auto trans test to become a Volvo master tech these days. Volvo never did teach an auto trans overhaul class, at least not in my days. Volvo prefers that dealer techs replace their transmissions with remans which makes sense in that unless you overhaul ATs often, the odds of one missing a small detail and having it come back are great really (not worth the hassle of trying the costly and very time consuming learning curve).