Cool-X HD Universal ATF Treatment, 950 ml, is a nanofluid oil additive for use in heavy duty truck transmissions, differentials, and gearboxes which require automatic transmission fluid as a lubricant. HD Universal ATF is compatible with Dex VI, Merc V, and older standard grades of ATF.

One bottle is enough concentrate to treat up to 40 quarts / liters of ATF.

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