Home / Driven Racing Oil / Transmission & Clutch Fluid / AT3 Synthetic Dex/MERC Auto. Transmission Fluid – Quart AT3 Synthetic Dex/MERC Auto. Transmission Fluid – Quart Sale! AT3 Synthetic Dex/MERC Auto. Transmission Fluid – Quart$10.99 $10.99 Out of stock Category: Transmission & Clutch Fluid Description Description AT3 Synthetic Dex/MERC Auto. Transmission Fluid – Quart