 An important component of his leadership was the Renault 1955 Agreement with the French trade union Confédération Générale du Travail (CGT) that was developed under Lefaucheux and executed posthumously at Renault.The trade union agreement stabilized industrial relations for 20 years, including the avoidance of strikes and lockouts, and the linking of wages to living costs and thereby to inflation.Lefaucheux's stewardship saw Renault becoming France's leading automobile manufacturer, with Lefaucheux directing the development of the commercially successful Renault 4CV — and up until the time of his death, its successor, the Renault Dauphine.