Delo® Syn ATF 668 is a full synthetic transmission fluid specifically engineered for Allison heavy duty automatic truck and bus transmissions. It is officially approved and licensed by Allison for transmissions requiring TES 668™ and is backwards compatible with TES 295®, TES 389® and TES 468®1.

Delo Syn ATF 668 delivers value through:

Improved transmission performance by providing greater than 13 times anti-shudder durability compared to TES 295 fluids that allows smoother shifts at low speeds and over a wider temperature range.