Is dexron 111 and dexron v1 the same?

No, Dexron III and Dexron VI are not the same. Dexron III is an older Transmission Fluid specification, while Dexron VI is a more advanced formulation that offers improved performance and protection. Dexron VI is backward compatible, meaning it can be used in applications that originally required Dexron III, but the reverse is not true. Always check manufacturer specifications to ensure the correct fluid is used for your vehicle.