CVT

📖 YOUCANIC Automotive Glossary

A CVT (Continuously Variable Transmission) uses a steel belt or chain running between two variable-diameter pulleys instead of fixed gear sets. By changing pulley diameters, the CVT provides an infinite range of gear ratios between its minimum and maximum, allowing the engine to operate at its most efficient RPM for any given speed and load. The TCM controls line pressure, pulley clamping force, and ratio changes based on throttle input, vehicle speed, and driving conditions.

CVTs require specific fluid formulations — using incorrect fluid causes immediate damage. Common issues include judder during light acceleration (15-40 mph), belt slip sensation, and ratio hunting. After CVT fluid changes, perform a CVT Reset with the YOUCANIC UCAN-II to clear adaptation values learned for old fluid characteristics. Common in Nissan/Infiniti, Subaru, Honda, and Toyota/Lexus vehicles.