CHEMPOL 4155 is a high-performance Automatic Transmission Fluid additive package specifically developed to meet the demanding requirements of General Motors DEXRON-III G/H and Ford MERCON specifications. It is suitable for use in a wide range of automatic transmissions, including those found in GM and Ford vehicles up to model year 2005, as well as Allison C4 applications and other systems where a DIIIG/H quality ATF is specified. When blended at a treat rate of 8.2 wt% with a suitable base oil, CHEMPOL 4155 delivers excellent performance in friction durability, oxidation stability, wear protection, and low-temperature fluidity—ensuring smooth shifting and reliable operation across a wide range of driving conditions.