What is the history behind the new DEXRON-VI transmission fluid?
GM introduced DEXRON-VI in April 2005 as the next generation factory fill transmission fluid for 2006 model-year trucks and cars equipped with Hydra-Matic transmissions. It was developed specifically to accommodate GM’s new 6L80 six-speed automatic transmission, which places greater demands on fluid performance because of direct contact between the clutches. Ongoing changes in transmission designs such as clutch operation, increased torque ratings, reduced sump volumes and higher fluid turnover rates require higher quality fluids to ensure consistent shift performance and longer service intervals.
