This research examines the identity crisis experienced by Mujeres de Acción Católica (MAC) at the turn of the 1970s and 1980s, roughly a decade after the major crisis that affected the Spanish Catholic Action between 1966 and 1968. At a time when both Spanish society and the Spanish Catholic Church were undergoing profound transformations—marked by the Transition to democracy, increasing secularisation, and the reorganisation of Catholic Action—MAC entered a period of seemingly inexorable decline. This decline was reflected in a sharp decrease in membership, a lack of generational renewal, and financial difficulties. Beyond documenting this process through a closer examination of MAC's presence across dioceses, membership figures, and organisational challenges, this research focuses on how this crisis reshaped internal dynamics within the movement and its relations with the ecclesiastical hierarchy. The analysis draws on archival sources from the ACE_MAC collection preserved at the Universidad Pontificia de Salamanca, including correspondence between the National Commission and diocesan commissions, exchanges with members of the ecclesiastical hierarchy, minutes from national meetings, and documentation related to Militante, the movement's internal bulletin. I will show how attempts to respond to institutional decline and to recover a lost dynamism generated tensions around the language of (in)equality within the movement and in its interactions with ecclesiastical authorities at parish, diocesan or national levels. I will consider whether these tensions led to the formulation of claims or negotiations concerning the position of MAC as a women's movement within the broader framework of Catholic Action.