The Valvoline Dex-III / Mer Automatic Transmission Fluid 5-Gallon is designed to protect and prolong the life of your automatic transmission. This fluid helps provide smooth shift performance where Dexron III or a Mercon fluid is specified. It has greater friction stability to help maintain consistent shift performance and excellent protection against wear and high temperature breakdown. It meets new tests for wear protection and shudder resistance, and helps reduce oxidation and viscosity breakdown. This fluid is perfect for keeping your transmission running smoothly and efficiently. FleetPride is your First Click in Heavy Duty®.