Pressurized ATF acts on the movable fifty percent on the pulley, switching its diameter. “As a result,” stated Maldonado, “a CVT transmission regularly changes equipment ratios as the two movable pulley halves slide on the shaft, though the other 50 % in the pulley continues to be locked in position.” https://rafaelblmlk.blog-ezine.com/34308636/details-fiction-and-gearbox-cvt