Can you mix dextron lll with transynd?

Mixing Dexron III with Transynd Transmission Fluid is not recommended. Dexron III is a conventional automatic transmission fluid, while Transynd is a synthetic fluid designed for specific applications, particularly in heavy-duty transmissions. Combining them can compromise the performance and protection qualities of the transmission, potentially leading to issues. It's best to use the manufacturer's recommended fluids for optimal performance.