What are the causes of CVT failure?

[DelReese]

Here are the reasons for CVT failure: 1. Engine: Fluctuations in engine speed at idle, or engine stalling when shifting into gear. In this case, it is necessary to check the oil pressure of the forward clutch, the flow rate of the radiator, and the engagement and release oil pressure of the lock-up. If the measured oil pressure is too low, attention should be paid to the valve body and oil passages, such as using the vacuum test method to check the main pressure regulator valve hole in the valve body. If the oil pressure of the main chain wheel is too low, the main chain wheel control valve in the vacuum test should be checked. At this point, the valve body can be replaced or individual valve holes can be repaired, mainly depending on the cost. 2. Torque converter without lock-up: This is related to the lock-up oil circuit of the torque converter, and it is necessary to check the lock-up oil pressure and lock-up release oil pressure. 3. Hydraulic noise at idle: Check the release oil pressure of the torque converter lock-up clutch.