5 Toyota CVT Transmission Problems & How to Fix Them

Written By: Jessica Anvar Stotz
Legally Reviewed By: Jessica Anvar Stotz

The most common problems with Toyota CVT transmissions include delayed acceleration, overheating, unusual noises, shuddering or jerking, and transmission slipping.

These issues tend to arise due to wear and tear on internal components, low or degraded transmission fluid, sensor or software malfunctions, and in some cases, design-related limitations in the CVT system itself.

Certain Toyota models such as newer Toyota Tacomas may be particularly susceptible to CVT Transmission Problems.

Understanding these problems—and how to address them—can help you avoid costly repairs and keep your Toyota running smoothly.

Below, we break down each issue, its likely causes, warning signs, and potential solutions.

Problem #1: Delayed Acceleration

• What it is: A noticeable lag occurs between pressing the accelerator pedal and the vehicle responding in forward motion. This delay can feel like the car is slow to “wake up,” especially from a complete stop.
• Potential causes: Common causes include a worn or slipping CVT belt, degraded or low transmission fluid, a faulty throttle position sensor, or software calibration issues within the transmission control module (TCM).
• Symptoms: You may notice slow response when accelerating from a stop, the engine revving without immediate forward movement, or hesitation during merging or passing maneuvers.
• Potential fix: Solutions may involve updating the TCM software, topping off or replacing the CVT fluid with Toyota-approved fluid, inspecting and replacing worn CVT components, and scanning for sensor-related error codes.

Problem #2: Overheating

• What it is: The CVT transmission reaches excessively high temperatures, which can lead to internal damage or force the vehicle into “limp mode” to prevent further harm.
• Potential causes: This issue can result from towing heavy loads, frequent driving in mountainous or high-stress conditions, low or aged transmission fluid, or a blocked or malfunctioning transmission cooler.
• Symptoms: Signs of overheating include a burning smell, illuminated warning lights (such as a transmission temperature warning), and reduced performance or activation of limp mode.
• Potential fix: Let the transmission cool down, replace old or low fluid with fresh CVT fluid, clean or replace the transmission cooler, and avoid overloading the vehicle beyond its capacity

Problem #3: Unusual Noises

• What it is: Drivers may hear high-pitched whining, humming, or rattling noises originating from the transmission area, often tied to mechanical wear or fluid issues.
• Potential causes: These sounds can be caused by worn bearings or pulleys, belt slippage, low or contaminated CVT fluid, or internal wear within the transmission assembly.
• Symptoms: Whining during acceleration, rattling when idling or slowing down, and noises that vary with engine speed are all common signs.
• Potential fix: Addressing this issue may require replacing worn bearings or pulleys, flushing and refilling the CVT fluid, or inspecting for internal damage and repairing or rebuilding the transmission as necessary.

Problem #4: Shuddering/Jerking

• What it is: The vehicle may shake or jerk during acceleration or when driving at lower speeds, reducing driving comfort and potentially indicating a deeper transmission issue.
• Potential causes: This can stem from old or contaminated CVT fluid, worn internal components such as the CVT belt or clutch packs, or software issues affecting smooth gear ratio transitions.
• Symptoms: You might feel vibrations during acceleration, jerking at low speeds, or inconsistent delivery of engine power.
• Potential fix: Fixes typically include performing a CVT fluid flush and refill, replacing worn internal transmission parts, and updating the transmission software to improve shift performance.

Problem #5: Transmission Slipping

• What it is: Transmission slipping occurs when the engine revs but the vehicle fails to accelerate as expected, often due to a failure in transferring power from the engine to the wheels.
• Potential causes: Low or leaking transmission fluid, a worn CVT belt or pulleys, and malfunctioning sensors or solenoids can all contribute to this problem.
• Symptoms: Common signs include engine revving without acceleration, delayed or inconsistent gear engagement, and a noticeable drop in fuel efficiency.
• Potential fix: To resolve slipping, check for and repair any fluid leaks, replace worn CVT components, and scan for diagnostic trouble codes to identify and replace any faulty sensors.

Is There a Toyota CVT Transmission Recall?

As of now, there is no official recall specifically targeting CVT transmissions across Toyota’s 2025 model lineup.

Toyota has however released several Technical Service Bulletins (TSBs) and software updates in recent years to address issues related to their Continuously Variable Transmissions (CVTs). These updates often aim to improve drivability and reduce issues such as:

• Delayed acceleration
• Overheating
• Shuddering or jerking during driving
• Transmission slipping 

TSBs are official communications from Toyota to dealerships that provide updated repair procedures, parts information, or diagnostic guidance.

They are not recalls, but they often address common concerns reported by customers. Toyota makes TSBs available through its Technical Information System (TIS), which requires a subscription for access.

Toyota’s TSBs and software updates for CVT-related issues typically aim to resolve drivability concerns, reduce wear, and prevent long-term damage.

Here’s a more specific breakdown of how these TSBs and updates work to fix common problems:

Software Recalibration

Many TSBs involve reprogramming the Transmission Control Module (TCM) or Engine Control Module (ECM). These updates adjust:

• Shift logic to reduce hesitation or jerky acceleration.Torque converter behavior to minimize shuddering.
• Throttle response to better match driver input and reduce lag.

This recalibration helps the CVT operate more smoothly and efficiently, especially under load or during stop-and-go driving.

Fluid-Related Fixes

Some TSBs address fluid degradation or incorrect fluid use, which is a major cause of CVT issues. Dealers may be instructed to flush and replace CVT fluid with a newer formulation.

In some cases, fluid additives are used to restore performance or reduce internal friction. This helps prevent overheating, belt slippage, and internal wear.

Hardware Inspections and Replacements

TSBs may also call for replacement parts or hardware inspections:

• Inspection of CVT belts or pulleys for wear or damage.
• Replacement of sensors (e.g., speed sensors or temperature sensors) that may be sending incorrect data to the TCM.
• Mount or valve body replacements if vibrations or shifting issues persist.
• Early Warning and Diagnostic Enhancements

Some updates improve the system’s ability to detect and report issues earlier, allowing for:

• More accurate diagnostic trouble codes (DTCs).
• Improved fail-safe modes to protect the transmission if a fault is detected.

These issues are often addressed during routine service visits, particularly if the vehicle is still within its warranty period.

While not classified as recalls, TSBs can provide valuable repair guidance for technicians and may lead to partial or full coverage of repair costs under certain conditions.

If you own a Toyota vehicle, here’s how to find TSB numbers:

1. Create a TIS account – You can register for a Standard or Professional subscription. The Professional level gives full access to TSBs, calibration files, and repair manuals.
2. Enter your vehicle details – Input the model, year, and trim or VIN.
3. Navigate to the “Service Bulletins” section.
4. Filter by Powertrain > Transmission/Transaxle > CVT. You’ll see a list of TSBs with their TSB numbers, titles, and release dates.

Here are three examples of how TSBs are typically numbered and titled:

1. TSB T-SB-0001-11: “Transaxle Rattle Noise Between 25 and 35 mph”
2. TSB T-SB-0103-21: “Engine Noise on Acceleration”
3. TSB T-SB-0076-24: Toyota Tacoma Transmission Problems

To find out whether your Toyota is subject to any current recalls or service campaigns, visit the official National Highway Traffic Safety Administration (NHTSA) recall lookup tool at nhtsa.gov/recalls.

You can search by entering your 17-digit Vehicle Identification Number (VIN). This tool provides accurate, up-to-date information directly from automakers and ensures you’re aware of any safety-related repairs available for your vehicle.

Who Pays for My Toyota CVT Transmission Issues?

Responsibility for covering the cost of Toyota CVT (Continuously Variable Transmission) repairs depends on several factors, including the age of your vehicle, its mileage, warranty coverage, and whether the issue is linked to a known defect. Here’s how the situation typically breaks down:

If Your Vehicle Is Still Under Warranty

If your Toyota is still covered under the Powertrain Warranty (usually 5 years or 60,000 miles in the U.S.), Toyota will generally pay for both parts and labor for any transmission repairs or replacements.

This includes problems such as slipping, shuddering, or complete transmission failure—provided the issue is determined to be a manufacturing defect.

 If the Warranty Has Expired

Once your vehicle is out of warranty, you’re usually responsible for repair costs unless the issue is covered by a recall or service campaign, or, you have an extended warranty or a vehicle service contract that includes transmission coverage.

If There’s a Technical Service Bulletin (TSB)

When a problem is addressed in a Toyota-issued TSB, the company may provide:

• A free software update or reduced-cost repair.
• Limited coverage, depending on the severity of the issue and the warranty status.

TSBs are not recalls but may still offer partial relief if your problem is well-documented.

If There Is a Recall or Class Action Lawsuit

If the CVT issue has led to an official recall or is part of a class action settlement, Toyota typically covers the entire cost of repairs. In many cases, you may also qualify for reimbursement if you previously paid out-of-pocket for a related repair.

If You’ve Already Paid for Repairs

If you’ve had the CVT repaired and later find out it was related to a recall or warranty extension, you may be eligible for reimbursement. In most cases, submitting your repair receipts and documentation to Toyota can initiate the reimbursement process.

How You Can Benefit from Working with a Lemon Law Attorney

If your Toyota has been in and out of the repair shop for recurring CVT transmission problems—such as delayed acceleration, slipping, or shuddering—it may qualify as a lemon under state or federal lemon law.

These laws generally apply when a vehicle has undergone multiple repair attempts for the same issue, and the defect significantly affects its safety, use, or value.

If your vehicle qualifies, you could be eligible for a refund, a replacement vehicle, or a cash settlement. In refund scenarios, manufacturers are allowed to deduct a usage fee based on the mileage before the issues began.

If a replacement is offered, you may be responsible for any price difference if the new model costs more than your original Toyota.

One major benefit of pursuing a lemon law claim is that most state statutes require the manufacturer to pay your attorney’s fees if your case is successful. This means you can seek legal support without worrying about upfront costs.

At the Lemon Law Experts, we’ve been helping Toyota owners and other drivers since 2009. Our experienced team works one-on-one with clients facing persistent vehicle issues, including CVT transmission defects.

We focus on achieving the best possible outcome, whether that’s compensation, a vehicle replacement, or another legal remedy.

If your Toyota has experienced repeated transmission issues and repairs haven’t fixed the problem, don’t wait. Contact us today for a free case evaluation and find out if your vehicle qualifies under lemon law.