Continuously Variable Transmissions (CVTs) have become a popular choice in modern vehicles due to their smooth driving experience and fuel efficiency. However, one common issue that many CVT owners face is the dreaded “shudder,” that jerking sensation that occurs when the transmission struggles to find the right ratio. Here are 10 expert hacks to help stop the shudder and get your CVT running smoothly again.
Check the CVT Fluid Level
One of the most common causes of CVT shudder is low or dirty transmission fluid. Regularly checking the CVT fluid level and topping it off can prevent this issue. Ensure you use the correct type of CVT fluid as recommended by your vehicle manufacturer, as the wrong fluid can lead to poor performance.
Change the CVT Fluid Regularly
Even if your fluid level is fine, old or contaminated fluid can cause the transmission to shudder. Changing the CVT fluid at the intervals specified by the manufacturer will keep your transmission functioning smoothly. Some manufacturers recommend changing it every 30,000 to 60,000 miles, depending on the make and model.
Perform a CVT Flush
If your transmission fluid has been in the system for a long time and you suspect it might be contaminated, a CVT flush can be an effective solution. A flush removes the old fluid and contaminants, replacing them with fresh fluid. This helps maintain proper lubrication and can resolve shuddering caused by fluid breakdown.
Inspect for Leaks
If you’re experiencing CVT shuddering, it’s worth checking for leaks in the transmission or fluid lines. Leaks can cause the fluid level to drop, leading to improper lubrication and transmission issues. If you find a leak, it’s important to address it promptly to avoid further damage.
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Reset the Transmission Control Module (TCM)
Sometimes the issue may lie in the transmission’s control system, rather than the physical components. Resetting the Transmission Control Module (TCM) can recalibrate the transmission and eliminate the shudder. This can often be done by disconnecting the battery or through a diagnostic scan tool.
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Use a CVT Cleaner Additive
There are several CVT cleaner additives available on the market that can help improve fluid flow and remove sludge or contaminants that contribute to shuddering. These additives can help reduce friction and restore smooth shifting. Always use a product recommended by your manufacturer for the best results.
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Keep the Engine in Optimal Condition
Sometimes CVT shuddering can be caused by engine-related issues, such as misfires, poor fuel quality, or faulty sensors. Regularly maintaining your engine, including spark plugs, air filters, and fuel injectors, can help reduce stress on the CVT and improve performance. A well-maintained engine ensures smoother operation and can prevent the shudder.
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Don’t Overload Your Vehicle
Excessive weight can strain your CVT and lead to poor performance, including shuddering. Avoid overloading your vehicle by following the manufacturer’s recommended weight limits for passengers and cargo. If you often tow or carry heavy loads, consider using a vehicle with a traditional automatic transmission designed for higher capacity.
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Warm Up the Transmission
CVTs, like all transmissions, perform better when they are properly warmed up. During cold weather, the fluid may be thicker, which can contribute to sluggish shifting and shuddering. Allow the car to warm up for a few minutes before driving, especially on colder days, to ensure that the transmission is operating at its best.
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Get the Transmission Recalibrated
If your CVT continues to experience shuddering even after addressing fluid and mechanical issues, recalibrating the transmission might be necessary. A mechanic can use specialized equipment to adjust the transmission’s shift points and parameters, which can help eliminate shuddering and restore smooth driving.
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Dealing with CVT shuddering can be frustrating, but with the right maintenance and attention to detail, it’s a problem that can be fixed. By regularly checking fluid levels, replacing filters, and addressing mechanical issues, you can ensure that your CVT runs smoothly for years to come. With these 10 hacks, you’ll have the tools and knowledge to keep your CVT in top condition and eliminate that pesky shudder for good.
Disclaimer: This list is solely the author’s opinion based on research and publicly available information.
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