The 2015 Chevy Traverse, a popular choice for families needing space and versatility, isn't without its share of issues. While generally considered a reliable vehicle, a significant number of owners have reported frustrating transmission problems that can range from annoying quirks to serious mechanical failures. Understanding these issues, their causes, and potential solutions is crucial for any 2015 Traverse owner or prospective buyer.

Uh Oh, My Traverse is Acting Up! What's Going On with the Transmission?

The 2015 Chevy Traverse utilizes the GM 6T70/6T75 six-speed automatic transmission. While this transmission has been used in numerous GM vehicles, it's also known for some common problems, especially as the vehicle ages. These issues can manifest in a variety of ways, impacting the driving experience and potentially leading to costly repairs. Let's dive into some of the most frequently reported transmission troubles.

The Dreaded Shudder: When Your Traverse Feels Like It's Vibrating

One of the most common complaints about the 2015 Traverse transmission is a noticeable shudder or vibration, particularly during acceleration or when maintaining a steady speed. This shudder is often described as a rumbling or shaking sensation that can be felt throughout the vehicle.

Why is this happening?

  • Torque Converter Clutch (TCC) Issues: The TCC is responsible for locking the engine and transmission together at higher speeds to improve fuel efficiency. When the TCC malfunctions, it can cause the shudder. This is often due to worn or damaged TCC components.
  • Transmission Fluid Degradation: Over time, transmission fluid can break down and lose its lubricating properties. This can lead to increased friction and wear within the transmission, contributing to the shudder. Contaminated fluid can also cause problems.
  • Valve Body Problems: The valve body controls the flow of transmission fluid to different parts of the transmission. If the valve body is clogged or malfunctioning, it can disrupt the proper operation of the TCC and other components, resulting in the shudder.

What can you do about it?

  • Transmission Fluid Flush: A transmission fluid flush can often resolve the shudder, especially if it's caused by fluid degradation. However, it's crucial to use the correct type of fluid specified for the 6T70/6T75 transmission.
  • Torque Converter Replacement: If the shudder persists after a fluid flush, the torque converter may need to be replaced. This is a more involved and costly repair.
  • Valve Body Repair or Replacement: If the valve body is identified as the culprit, it may need to be repaired or replaced. In some cases, cleaning the valve body can resolve the issue.

Rough Shifting: Jerky Transitions That Make You Cringe

Another common complaint is rough or harsh shifting. This can manifest as jerky transitions between gears, delayed shifts, or a feeling of the transmission "slamming" into gear. These symptoms can make driving uncomfortable and potentially unsafe.

Why is this happening?

  • Low Transmission Fluid Level: Insufficient transmission fluid can lead to poor lubrication and increased friction, resulting in rough shifting.
  • Solenoid Issues: Solenoids are electromechanical devices that control the flow of transmission fluid to different gears. If a solenoid malfunctions, it can disrupt the shifting process.
  • Internal Transmission Damage: In more severe cases, rough shifting can be a sign of internal damage to the transmission, such as worn clutches or gears.
  • Adaptive Learning Issues: Modern transmissions "learn" your driving habits and adjust their shifting patterns accordingly. Sometimes, this adaptive learning can become corrupted, leading to erratic shifting.

What can you do about it?

  • Check Transmission Fluid Level: The first step is to check the transmission fluid level and top it off if necessary. Ensure you use the correct type of fluid.
  • Solenoid Replacement: If a faulty solenoid is identified, it can be replaced. This is often a less expensive repair than replacing the entire transmission.
  • Transmission Rebuild or Replacement: If the rough shifting is caused by internal damage, the transmission may need to be rebuilt or replaced. This is a significant repair and should be performed by a qualified technician.
  • Adaptive Learning Reset: A mechanic can reset the transmission's adaptive learning, forcing it to relearn your driving habits. This can sometimes resolve rough shifting issues.

Slipping Gears: Feeling Like You're Losing Power

Gear slipping is another alarming symptom that owners have reported. This occurs when the transmission unexpectedly shifts out of gear or fails to engage the correct gear, resulting in a loss of power. This is not only frustrating but also potentially dangerous, especially in heavy traffic.

Why is this happening?

  • Worn Clutches: The clutches are responsible for engaging and disengaging gears within the transmission. Over time, these clutches can wear down, leading to slipping.
  • Low Transmission Fluid Pressure: Insufficient fluid pressure can prevent the clutches from engaging properly, resulting in slipping.
  • Valve Body Problems: Again, a malfunctioning valve body can disrupt the flow of transmission fluid, leading to slipping.
  • Internal Transmission Damage: Severe internal damage, such as broken gears or shafts, can also cause slipping.

What can you do about it?

  • Transmission Fluid Flush and Filter Change: A fluid flush and filter change can sometimes resolve minor slipping issues, especially if they are caused by contaminated fluid.
  • Valve Body Repair or Replacement: If the valve body is identified as the problem, it may need to be repaired or replaced.
  • Transmission Rebuild or Replacement: If the slipping is caused by worn clutches or other internal damage, the transmission will likely need to be rebuilt or replaced.

The Check Engine Light: Is It My Transmission's Fault?

The dreaded check engine light (CEL) can illuminate for a variety of reasons, and transmission problems are certainly among them. If your CEL is on and you're experiencing transmission-related symptoms, it's important to have the vehicle diagnosed by a qualified mechanic.

Why is this happening?

  • Transmission-Specific Trouble Codes: The vehicle's computer stores diagnostic trouble codes (DTCs) that can pinpoint specific transmission problems.
  • Sensor Malfunctions: Sensors monitor various aspects of the transmission's operation, such as fluid temperature and speed. If a sensor malfunctions, it can trigger the CEL.
  • Electrical Issues: Problems with the wiring or connectors related to the transmission can also trigger the CEL.

What can you do about it?

  • Scan for Trouble Codes: A mechanic can use a scan tool to retrieve the DTCs stored in the vehicle's computer. This will provide valuable information about the nature of the problem.
  • Inspect Wiring and Connectors: A visual inspection of the wiring and connectors related to the transmission can reveal any obvious damage or corrosion.
  • Sensor Replacement: If a faulty sensor is identified, it can be replaced.

Preventative Maintenance: Keeping Your Traverse Transmission Happy

While some transmission problems are unavoidable, preventative maintenance can significantly extend the life of your 2015 Traverse's transmission and reduce the risk of major issues.

What can you do?

  • Regular Transmission Fluid Changes: Follow the manufacturer's recommended maintenance schedule for transmission fluid changes. This is crucial for maintaining proper lubrication and preventing wear.
  • Avoid Aggressive Driving: Aggressive driving habits, such as rapid acceleration and hard braking, can put extra stress on the transmission.
  • Check Transmission Fluid Level Regularly: Periodically check the transmission fluid level to ensure it's within the proper range.
  • Address Minor Issues Promptly: Don't ignore minor transmission problems. Addressing them early can prevent them from escalating into more serious and costly repairs.

Is There a Recall for 2015 Traverse Transmission Problems?

While there hasn't been a widespread recall specifically addressing all 2015 Chevy Traverse transmission problems, it's always a good idea to check with the National Highway Traffic Safety Administration (NHTSA) website or your local Chevy dealer to see if there are any applicable recalls or service bulletins related to your vehicle. Recalls are typically issued for safety-related defects and are performed free of charge. Service bulletins provide guidance to technicians on how to diagnose and repair common problems.

Frequently Asked Questions

  • Why is my 2015 Traverse transmission shuddering? A shudder can be caused by torque converter clutch issues, degraded transmission fluid, or valve body problems. A fluid flush or component replacement may be necessary.
  • How often should I change my transmission fluid? Refer to your owner's manual, but typically every 45,000 to 60,000 miles is recommended for normal driving conditions. More frequent changes may be needed for severe driving conditions.
  • Is it safe to drive with a slipping transmission? Driving with a slipping transmission is not recommended as it can be dangerous and cause further damage. Have it inspected by a mechanic as soon as possible.
  • Can I check my transmission fluid level myself? Yes, but it's different from checking your oil. Consult your owner's manual for the location of the dipstick and the proper procedure.
  • How much does it cost to replace a 2015 Traverse transmission? The cost can vary widely depending on the shop and the type of replacement (new, rebuilt, or used), but expect to pay between $3,000 and $5,000.

In conclusion, while the 2015 Chevy Traverse can be a great family vehicle, transmission problems are a known issue. Being aware of these potential problems and taking preventative maintenance steps can help you keep your Traverse running smoothly for years to come, so don't ignore those early warning signs!