In August 1988, Menai Bus Service was purchased by Ron Deane who at the time operated Deanes Coaches on the North Shore. In March 1989 the Hurstville to Bankstown and Lugarno services of Peakhurst Coaches were purchased, although the latter was sold in August 1989 to Punchbowl Bus Company. In July 1989, the business of Hadfields Bus Lines, Engadine was purchased and at this point, all the operations were rebranded as Southtrans. In October 1990, three routes were transferred from South Western Coach Lines, followed in December 1990 by two routes from Sutherland Bus Service.