New ACDelco 10-9243 Dexron VI Full Synthetic. ACDelco DEXRON-VI Automatic Transmission Fluid is the most recent release in the well-established DEXRON series of automotive transmission fluids. ACDelco DEXRON-VI Automatic Transmission Fluid is not for use in CVT (Continuously Variable Transmissions) or DCT (Dual Clutch Transmissions) that require specialized fluids.