Transmission Type by Car: CVT, Automatic or Manual / Chevrolet / Van 15/25 ConversionChevrolet Van 15/25 Conversion Transmission by year YearTransmission20084-speed automatic20074-speed automatic20064-speed automatic20054-speed automatic20044-speed automatic20034-speed automatic Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).