9 Best heavy-duty transmission fluids

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Robust fluids designed for high-stress applications in trucks and industrial equipment. Heavy-duty transmission fluids are formulated to withstand the extreme pressures and temperatures encountered in trucks, construction equipment, and other heavy machinery. These fluids offer superior protection against wear, oxidation, and thermal breakdown in demanding operating conditions. They typically have higher viscosity and enhanced additive packages to maintain a strong lubricating film even under heavy loads. Heavy-duty transmission fluids also often provide improved shear stability and seal compatibility to ensure long-term performance and reliability in commercial and industrial applications.
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