Transmission Type by Car: CVT, Automatic or Manual / Porsche / Carrera 4 Cabriolet KitPorsche Carrera 4 Cabriolet Kit Transmission by year YearTransmission20055-speed automatic or 6-speed manual20046-speed manual20035-speed automatic or 6-speed manual Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).