This gearbox had been improved in its reliability for Lotus 15 and 16 in 1957-58 by a Keith Duckworth who had just joined Lotus as a gearbox engineer.
Esta caixa de cambios fora mellorada na súa fiabilidade para o Lotus 15 e 16 en 1957-58 por Keith Duckworth que acababa de unirse a Lotus como enxeñeiro de caixa de cambios.