INDIANAPOLIS–(BUSINESS WIRE)–Allison Transmission, the largest global manufacturer of medium- and heavy-duty fully automatic transmissions, announced today a new formulation of its high-performing transmission fluid. TES 668™ is a modern formulation with many advantages compared to mineral-based, non-synthetic fluids. This next generation transmission fluid is specified for all Allison 1000 Series™, 2000 Series™, 3000 Series™ and 4000 Series™ automatic transmissions. TES 668 builds on the dem
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