What is the cause of CVT vibration?
2 Answers
When the engine operates at low RPM, insufficient and unstable torque output may cause the transmission to frequently adjust the gear ratio - rapidly increasing it to raise engine speed and prevent stalling, then quickly decreasing it to lower engine speed for better fuel efficiency (at the same vehicle speed, lower engine RPM means better fuel economy). Here's detailed information about CVT transmissions: 1. Overview: CVT stands for Continuously Variable Transmission. The key difference between CVT and stepped transmissions is that CVT provides a continuous range of gear ratios rather than fixed steps, resulting in improved fuel economy, power performance, driving smoothness, while also reducing emissions and costs. 2. Working Principle: The system primarily consists of driving pulley set, driven pulley set, metal belt, and hydraulic pump. The operation is achieved through the engine shaft connecting to a small steel pulley that drives a larger pulley via a steel belt.
I've been driving a CVT car for nearly ten years and found that vibrations often stem from several key points. Belt wear or chain slippage is the most common, especially noticeable during steep climbs or rapid acceleration. If the hydraulic system has insufficient oil pressure, such as dirty or low oil levels, it can also cause the transmission to shake unsteadily. I once ignored this and ended up spending over a thousand dollars on transmission repairs. I recommend first checking the CVT fluid condition—pull out the dipstick to see if it's clear and odorless; if it's deteriorated, replace it with fresh oil. Driving habits also play a role; aggressive throttle inputs and frequent starts can lead to overheating, worsening the vibrations. Remember to maintain regular servicing, such as changing the oil every 40,000 kilometers, which can significantly extend its lifespan. Don't tough it out—getting a professional diagnosis is the right way to go, ensuring safety and peace of mind.
