Toyota AT Fluid T-IV is a fully synthetic, low-viscosity fluid designed to ensure reliable and smooth operation of automatic gearboxes. Its key characteristics and benefits include:

• Superior Performance: It provides a precise friction coefficient that helps prevent transmission shudder and ensures smooth, consistent gear shifts across various temperatures.
• System Protection: The fluid contains specialized additives that protect internal transmission components against corrosion, excessive wear, and premature degradation.
• Cleanliness: Its chemical formulation helps reduce the formation of harmful deposits, sludge, and acid, keeping the transmission system clean and extending the fluid's service life.
• Compatibility: It is backward compatible with earlier Toyota fluid types (Type T, T-II, and T-III) and is recommended for use in AISIN-WARNER transmissions requiring JWS 3309 specifications.