2023 Chevrolet Traverse 9-Speed Transmission Guide: Reliability & Shifting Quality

You know that feeling when you’re merging onto a busy highway, the family is packed in, and you need the SUV to just go—no hesitation, no drama. That’s where the 2023 Chevrolet Traverse’s nine-speed automatic transmission is supposed to shine, and for most drivers, it delivers a smooth, confident ride.

TL;DR
The 2023 Traverse’s 9-speed automatic transmission generally provides smooth and responsive shifting, complementing the 310-horsepower V6 engine well for daily driving and highway merging. However, the 2023 model year has been affected by two notable issues: a recall for a physical defect involving the sun gear and a technical service bulletin addressing a shuddering sensation. Overall, with proper maintenance and awareness of these specific problems, the transmission is considered reliable and a good partner for the Traverse’s capable V6 .

Key Takeaways

• Smooth Shifting: The 9-speed transmission is widely praised for its smooth, unobtrusive shifts, making around-town driving and highway cruising pleasant .
• Recall Awareness: A 2023 recall affects about 4,941 Traverse models due to a faulty sun gear that can cause the axle to disengage, leading to a loss of power .
• Shudder Fix: If you experience a “rumble strip” feeling at highway speeds, a GM Technical Service Bulletin (TSB) recommends a specific transmission fluid flush using Mobil 1 Synthetic LV ATF HP to fix the issue .
• Strong Performance: The transmission works well with the V6 to provide one of the quicker accelerations in its class, with tested 0-60 mph times around 7.3 seconds .
• Maintenance Matters: Regular transmission fluid changes are key to longevity. GM recommends using fluids that meet the Dexron VI specification .

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What to Expect from the 2023 Traverse Transmission

The Driving Experience: Smooth and Responsive

The pairing of the 3.6-liter V6 and the nine-speed automatic is a highlight of the Traverse. It’s designed to be an unobtrusive partner for your daily drive, whether you’re navigating city streets or cruising on the open road.

Professional reviewers have described the transmission as a “good partner” for both around-town duties and longer family trips . The shifts are generally smooth and prompt, with the transmission having a gear ratio for every occasion. This contributes to a relaxed driving experience, and the cabin is quiet enough that you might need to check the tachometer at a stoplight to see if the engine is running .

• Stop/Start System: The Traverse features an automatic stop/start system that cuts the engine at red lights to save fuel. This system is widely considered one of the more seamless implementations on the market, restarting smoothly and without much fuss .
• Performance: The transmission helps deliver confident acceleration. Tested 0-60 mph times come in at about 7.3 seconds, putting the Traverse among the quicker vehicles in its class .

Known Issues and Reliability Concerns

While the transmission is generally well-regarded, the 2023 model year has some specific issues that owners and potential buyers should be aware of. These fall into two main categories: a recall and a technical service bulletin.

Recall: Potential Loss of Propulsion

The most serious issue is a recall from General Motors affecting certain 2023 Traverse models . This recall involves vehicles built with a transmission that may have an improperly cast sun gear.

What happens? This defect can cause the driver-side half-shaft to disengage from the transmission . The result can be a grinding noise, transmission slipping, or even a complete loss of power, meaning the vehicle won’t move when shifted into Drive or Reverse . As a safety reminder, always have recall work performed immediately. This repair is free of charge at your Chevrolet dealer .

Technical Service Bulletin (TSB): Transmission Shudder

Another common issue is a shudder, vibration, or a feeling like driving over a “rumble strip” at cruising speeds . This is often caused by torque converter clutch slippage.

What’s the fix? GM has issued a TSB that requires a special 20-quart transmission flush. This procedure removes the old fluid and replaces it with Mobil 1 Synthetic LV ATF HP, which is commonly referred to as “blue label” fluid . This lower-viscosity fluid is designed to resolve the shudder issue. If your Traverse experiences this shudder, especially with less than 30,000 miles, mention this TSB to your dealer. Some owners on forums also report success with regular drain-and-fill services using Valvoline MaxLife fluid, which meets the Dexron VI specification .

Living with the 9-Speed: Maintenance Tips

Proper maintenance is key to getting the most out of any automatic transmission. Here are some tips for keeping your Traverse’s 9-speed in top shape:

• Use the Right Fluid: Your transmission calls for fluid that meets the Dexron VI specification. While some enthusiasts recommend specific brands like Valvoline MaxLife or the GM-recommended Mobil 1 fluid for specific fixes, sticking to fluids that are explicitly Dexron VI certified is the safest bet for regular maintenance .
• Regular Service: While the owners manual may have its own schedule, many experienced owners recommend changing the transmission fluid every 30,000 to 35,000 miles for maximum longevity .
• Listen to Your Car: If you notice any new shuddering, hard shifts, or unusual noises, don’t ignore them. Getting them checked out early can prevent more significant and costly repairs down the road.

Timeline: The Traverse’s 9-Speed Journey

The 9-speed automatic has been a part of the Traverse since its second-generation redesign.

• 2018 – 2023: The 9-speed transmission is introduced with the second-generation Traverse. While praised for its smooth operation, early models (2018) saw some complaints about sluggish lower gears and hesitation from the auto stop/start system .
• 2023 Model Year: The transmission is well-refined, but the 2023 model year sees the specific recall for the sun gear issue and the TSB for the shudder problem come to light .
• 2024 and Beyond: The powertrain is updated as Chevrolet moves to a new turbocharged four-cylinder engine, leaving the V6 and its specific transmission characteristics behind.

FAQ Section

Is the 2023 Chevrolet Traverse transmission reliable?
Yes, generally. The nine-speed is praised for smooth, prompt shifts. However, 2023 models have a recall for a physical defect and a TSB for a shudder issue, which are important to address if they affect your vehicle .

What is the recall on the 2023 Traverse transmission?
GM recalled certain 2023 Traverse models because the transmission may have a faulty sun gear. This can cause the axle to disengage, leading to a loss of power or the vehicle not moving in Drive or Reverse .

What does the Traverse transmission shudder feel like?
It’s often described as a vibration, shudder, or a “rumble strip” feeling that occurs at steady highway speeds. This is typically caused by torque converter clutch slippage .

How is the transmission shudder fixed?
The primary fix is a GM Technical Service Bulletin (TSB) that requires a complete transmission flush and replacement of the fluid with a specific lower-viscosity fluid: Mobil 1 Synthetic LV ATF HP .

What type of transmission fluid does the 2023 Traverse use?
The owner’s manual specifies Dexron VI transmission fluid. Some GM service procedures may use a specific high-performance fluid, but for regular maintenance, Dexron VI is the correct specification .

Does the Traverse have a smooth transmission?
Yes, most reviews and owner feedback indicate the nine-speed provides smooth and unobtrusive shifts, contributing to a relaxed and confident driving experience .

Is the auto stop/start system annoying in the Traverse?
No. The system in the Traverse is frequently highlighted as one of the best-integrated and most seamless systems on the market, restarting the engine without much fuss or hesitation .

References

Sources and Further Reading:

• Kelley Blue Book: Recall Alert
• Center for Auto Safety: 2023 Traverse Recalls
• U.S. News & World Report: 2023 Traverse Performance Review
• Cars.com: 2023 Traverse Consumer Reviews

The 2023 Chevrolet Traverse offers a compelling mix of power and practicality. Its nine-speed transmission is a key part of that formula, delivering a driving experience that’s both smooth and capable. Like any complex piece of machinery, it’s not without its quirks, but awareness of the recall and shudder issues can help you keep your Traverse running smoothly for years to come.

Have you experienced any of these transmission quirks in your Traverse? Share your experience in the comments below!