Unfortunately, the victory in Belgium was the high point for AAR as engine problems continued to plague the Eagle. Despite the antiquated engine tooling used by the Weslake factory (dating from World War I), failures rarely stemmed from the engine design itself, but more often from unreliable peripheral systems like fuel pumps, fuel injection and the oil delivery system. He led the 1967 German Grand Prix at the Nürburgring when a driveshaft failed two laps from the end with a 42-second lead in hand. After a third-place finish in Canada that year, the car would finish only one more race. By the end of the 1968 season, Gurney was driving a McLaren-Ford. His last Formula One race was the 1970 British Grand Prix.