The 2017 Toyota Highlander is generally regarded as a reliable SUV, known for its longevity and practicality. However, like any vehicle, it's not immune to potential issues, and one area that has raised concerns for some owners is the transmission. While not a widespread epidemic, understanding the potential transmission problems associated with the 2017 Highlander can help you identify issues early, seek appropriate repairs, and potentially save yourself a significant headache (and expense) down the road. Let's dive into the specifics.

So, What's the Buzz About the 2017 Highlander Transmission?

While Toyota vehicles are known for their reliability, some owners of the 2017 Highlander have reported experiencing transmission-related issues. These range from minor inconveniences to more significant problems that require professional attention. It's important to note that not all 2017 Highlanders will experience these issues, and many owners enjoy trouble-free operation. However, being aware of the potential pitfalls can help you stay vigilant and proactive about your vehicle's maintenance.

Common Symptoms: What to Watch Out For

Recognizing the symptoms of a failing or problematic transmission is crucial for early detection and preventing further damage. Here are some of the most frequently reported symptoms associated with 2017 Highlander transmission issues:

  • Rough Shifting: This is perhaps the most common complaint. You might notice jerky or hesitant shifts between gears, especially during acceleration or deceleration. It can feel like the transmission is struggling to find the right gear.

  • Slipping Gears: Gear slippage occurs when the transmission unexpectedly shifts out of gear while you're driving. This can be dangerous, especially at higher speeds, as it can cause a sudden loss of power.

  • Delayed Engagement: This refers to a noticeable delay between when you shift into drive or reverse and when the vehicle actually starts moving. It can feel like the transmission is "thinking" about engaging.

  • Unusual Noises: Clunking, whining, or humming noises coming from the transmission area are often indicative of a problem. These noises might be more pronounced during specific driving conditions, such as when shifting gears.

  • Shuddering or Vibrating: A shudder or vibration, particularly during acceleration or when the torque converter is locking up, can signal a transmission issue.

  • Check Engine Light: While a check engine light can indicate a wide range of problems, it's always a good idea to have it scanned if you suspect a transmission issue. The code stored in the computer can provide valuable clues about the source of the problem.

  • Difficulty Accelerating: If your Highlander struggles to accelerate, even when you press the gas pedal, it could be a sign of a transmission problem. The transmission may not be able to properly transfer power from the engine to the wheels.

  • Burning Smell: A burning smell emanating from the engine compartment can indicate overheating of the transmission fluid, which is often a sign of a serious problem.

What Could Be Causing These Transmission Troubles?

Several factors can contribute to transmission problems in the 2017 Toyota Highlander. Here are some of the most common culprits:

  • Low Transmission Fluid: Insufficient transmission fluid can lead to a variety of problems, including rough shifting, slipping gears, and overheating. Leaks, improper filling, or simply neglecting to check the fluid level can all contribute to this issue.

  • Contaminated Transmission Fluid: Over time, transmission fluid can become contaminated with debris and metal particles. This contaminated fluid can damage the internal components of the transmission and lead to performance issues.

  • Worn-Out Transmission Components: Like any mechanical system, the components within the transmission can wear out over time. This includes things like clutch plates, seals, and bearings.

  • Valve Body Issues: The valve body is a complex component that controls the flow of transmission fluid. Problems with the valve body can lead to shifting problems and other performance issues.

  • Torque Converter Problems: The torque converter is responsible for transferring power from the engine to the transmission. Issues with the torque converter can cause shuddering, vibration, and difficulty accelerating.

  • Software Glitches: In some cases, transmission problems can be caused by software glitches in the transmission control module (TCM). These glitches can sometimes be resolved with a software update.

  • Overheating: Excessive heat is a major enemy of automatic transmissions. Overheating can damage the transmission fluid and internal components, leading to premature failure.

Digging Deeper: Is There a Pattern Here?

While individual experiences vary, some patterns have emerged in reports of 2017 Highlander transmission problems. For example, some owners have reported experiencing rough shifting at lower speeds, particularly when the transmission is cold. Others have reported issues with the transmission "hunting" for the right gear, especially when driving uphill. Understanding these patterns can help you determine if your Highlander is exhibiting symptoms similar to those reported by other owners.

DIY vs. Professional Help: What's the Right Approach?

For minor issues, such as checking and topping off the transmission fluid, you might be able to handle the problem yourself. However, for more complex issues, it's always best to seek professional help from a qualified mechanic. Attempting to repair a transmission without the proper knowledge and tools can lead to further damage and potentially void your warranty.

When to DIY:

  • Checking and topping off transmission fluid (after verifying the correct type).
  • Inspecting for obvious leaks.

When to See a Pro:

  • Rough shifting, slipping gears, or delayed engagement.
  • Unusual noises coming from the transmission.
  • Shuddering or vibrating.
  • Check engine light illuminated.
  • Difficulty accelerating.
  • Any other symptoms that suggest a serious transmission problem.

Prevention is Key: Keeping Your Transmission Happy

The best way to avoid transmission problems is to follow a regular maintenance schedule. Here are some tips for keeping your 2017 Highlander transmission in good condition:

  • Regular Transmission Fluid Changes: Follow Toyota's recommended maintenance schedule for transmission fluid changes. Using the correct type of fluid is crucial.

  • Avoid Hard Driving: Aggressive driving habits, such as rapid acceleration and hard braking, can put extra stress on the transmission.

  • Don't Overload Your Vehicle: Exceeding the vehicle's weight capacity can also put extra strain on the transmission.

  • Regular Inspections: Have your transmission inspected regularly by a qualified mechanic.

  • Address Issues Promptly: Don't ignore any symptoms of a transmission problem. Addressing issues early can prevent them from escalating into more serious (and expensive) repairs.

What About Recalls and Technical Service Bulletins (TSBs)?

It's always a good idea to check if there are any recalls or Technical Service Bulletins (TSBs) related to your 2017 Toyota Highlander's transmission. A recall indicates a safety-related defect that the manufacturer is required to fix free of charge. A TSB, on the other hand, is a notification from the manufacturer to dealerships about a specific problem and how to fix it. You can check for recalls and TSBs on the National Highway Traffic Safety Administration (NHTSA) website.

Okay, Let's Talk Money: How Much Will This Cost?

The cost of repairing or replacing a transmission can vary widely depending on the severity of the problem and the specific repairs required. Simple repairs, such as replacing the transmission fluid or a faulty sensor, might cost a few hundred dollars. However, more extensive repairs, such as rebuilding or replacing the entire transmission, can cost several thousand dollars. Getting a quote from a reputable mechanic is essential before proceeding with any repairs.

Frequently Asked Questions

  • What type of transmission fluid does my 2017 Highlander use? Your 2017 Highlander likely uses Toyota WS (World Standard) automatic transmission fluid. Always verify the correct fluid type in your owner's manual.

  • How often should I change my transmission fluid? Toyota typically recommends changing the automatic transmission fluid every 60,000 miles or 72 months under normal driving conditions. Severe driving conditions may require more frequent changes.

  • Is it safe to drive with a slipping transmission? No, driving with a slipping transmission is not safe. It can lead to a sudden loss of power and increase the risk of an accident.

  • Can I add transmission fluid myself? Yes, you can add transmission fluid yourself, but make sure you use the correct type and follow the instructions in your owner's manual. Be careful not to overfill the transmission.

  • What is a transmission flush? A transmission flush involves using a machine to completely replace all of the old transmission fluid with new fluid. It's a more thorough process than a simple fluid drain and fill.

The Bottom Line: Stay Informed and Be Proactive

While the 2017 Toyota Highlander is generally a reliable vehicle, being aware of potential transmission problems can help you identify issues early and take appropriate action. Regular maintenance and prompt attention to any symptoms can help keep your transmission running smoothly for years to come.