A Continuously Variable Transmission (CVT) is a type of automatic transmission found in modern vehicles. Unlike traditional transmissions with fixed gears, a CVT uses a system of belts and pulleys to provide an infinite number of gear ratios within a specific range. This results in smooth acceleration and better fuel efficiency, as the engine can operate at its optimal RPM. While some drivers may find the absence of traditional gear shifts unusual, CVTs offer a more comfortable ride and have become popular in various vehicle types.

Rebuilding a CVT is complex because they have intricate components, use variable clamping forces, involve electronic controls, and require specialized expertise. Their unique design and numerous parts, along with the need for precision calibration and testing, make CVT rebuilding a challenging task that demands specific knowledge and skills.