From the 1963 season, Brabham was partnered by American driver Dan Gurney, the pair now running in Australia's racing colours of green and gold. Brabham took the team's first win at the non-championship Solitude Grand Prix in 1963. Gurney took the marque's first two wins in the world championship, at the 1964 French and Mexican Grands Prix. Brabham works and customer cars took another three non-championship wins during the 1964 season. The 1965 season was less successful, with no championship wins. Brabham finished third or fourth in the Constructors' Championship for three years running, but poor reliability marred promising performances on several occasions. Motor sport authors Mike Lawrence and David Hodges have said that a lack of resources may have cost the team results, a view echoed by Tauranac.