A further process should be to employ a variable displacement pump.  When the pump is configured for very low displacement, it produces a lower quantity of oil flow, leading to the hydraulic motor(s) to turn much more slowly but surely. Yet another movie of lubricant is placed on the pulleys. https://charlievxwtr.targetblogs.com/33211528/5-tips-about-gearbox-cvt-you-can-use-today