Swedish unions aren't primarily focused on wages but on other benefits, such as more support during paternity leave and better work-life conditions.
Of course they failed to force the 32 hour workweek during the negotiations over the last few months but UAW workers seem to get more vacation days than Volvo in addition to much higher wages (and profit sharing bonuses etc.)and pensions.
did you mean the 40 or 48 hour workweek?
Instead they ended up negotiating higher 20-60% wages and improving some other benefits but no reduction in working hours.
But in my opinion, the overtime demand was just a "duck"[1]. Something easily negotiated away so that the union and company could meet in the middle. It's standard procedure in negotiations to make ridiculous demands so that you don't have to negotiate away non-ridiculous demands.