2017 Nissan Murano Transmission Problems

The 2017 Nissan Murano, a mid-size crossover SUV, entered the market aiming to blend style, comfort, and technology. While generally well-received, it's not immune to mechanical issues. A significant area of concern for automotive professionals revolves around its transmission, specifically the Jatco-sourced Continuously Variable Transmission (CVT). This article delves into the common transmission problems experienced with the 2017 Murano, analyzing the technical specifications, engineering choices, real-world performance, and comparing it to alternatives. We will also discuss reliability, maintenance, and future trends to provide a comprehensive understanding for automotive professionals.

Technical Specifications and Engineering Choices

The 2017 Murano predominantly utilizes the Jatco CVT8 (RE0F10D) transmission. This CVT is designed to improve fuel efficiency and provide smoother acceleration compared to traditional automatic transmissions. Instead of fixed gears, it uses a belt-and-pulley system to provide a theoretically infinite range of gear ratios. The system consists of a steel belt connecting two variable-diameter pulleys, one driven by the engine and the other driving the wheels. Hydraulic pressure controls the pulley diameters, effectively changing the "gear ratio."

Nissan opted for a CVT to achieve better fuel economy and a more comfortable driving experience. CVTs allow the engine to operate at its most efficient RPM range more consistently, leading to improved MPG. Furthermore, the seamless transitions between "gear ratios" eliminate the shift shocks associated with conventional transmissions, contributing to a smoother ride.

Real-World Performance and Common Issues

Despite the theoretical advantages, the CVT in the 2017 Murano has faced its share of real-world performance challenges. Some of the most common issues reported include:

Juddering and Shuddering: This is a prevalent complaint, often described as a shaking or vibrating sensation during acceleration, particularly at lower speeds. It's often attributed to wear and tear on the belt or pulleys, or degradation of the transmission fluid.
Hesitation and Delayed Engagement: Drivers sometimes experience a delay between pressing the accelerator and the vehicle actually moving. This can be particularly noticeable when accelerating from a stop or when attempting to pass another vehicle.
Transmission Slippage: In severe cases, the CVT might slip, causing the engine RPM to increase without a corresponding increase in vehicle speed. This indicates a significant loss of friction within the transmission.
Overheating: CVTs can generate significant heat, especially under heavy load or in hot weather. Overheating can lead to premature wear and damage to the transmission components.
Complete Transmission Failure: While less common, complete transmission failure can occur, necessitating a costly replacement.

These problems are often exacerbated by factors such as aggressive driving habits, infrequent transmission fluid changes, and towing beyond the vehicle's rated capacity.

Comparison with Alternatives

Several other mid-size SUVs from 2017 employed traditional automatic transmissions. For instance, the Honda Pilot used a 6-speed or 9-speed automatic transmission (depending on the trim), while the Toyota Highlander primarily used an 8-speed automatic. These transmissions, while potentially less fuel-efficient than the CVT in optimal conditions, generally offered greater perceived reliability and a more familiar driving experience.

Pros of CVT (in theory):

Potentially better fuel economy

Smoother acceleration

Reduced shift shock

Cons of CVT (in practice, for the 2017 Murano):

Higher repair costs due to complexity

Potential for juddering and shuddering

Concerns about long-term durability

Less familiar driving experience for some drivers

Traditional automatic transmissions, on the other hand, offer:

Greater perceived reliability

Lower repair costs (generally)

More familiar driving experience

However, they can suffer from:

Lower fuel economy (compared to CVT in optimal conditions)

Shift shock during gear changes

Reliability Aspects

The reliability of the CVT in the 2017 Murano is a point of contention. While some owners experience no issues throughout the vehicle's lifespan, others face significant problems. Several factors contribute to the perceived lower reliability of the CVT:

Design Complexity: CVTs are inherently more complex than traditional automatic transmissions, with more moving parts and intricate control systems. This complexity increases the potential for failure.
Heat Sensitivity: CVTs are sensitive to heat, and prolonged operation under heavy load or in hot conditions can accelerate wear and tear.
Fluid Degradation: The special transmission fluid required by CVTs is crucial for their proper operation. Infrequent fluid changes or the use of incorrect fluid can lead to performance issues and damage.
Driving Habits: Aggressive driving habits, such as frequent hard acceleration and towing beyond the vehicle's capacity, can put excessive stress on the CVT and shorten its lifespan.

Maintenance Tips

Proper maintenance is essential for maximizing the lifespan of the CVT in the 2017 Murano. Here are some key maintenance tips for automotive professionals to advise their customers:

Regular Transmission Fluid Changes: Adhere to the recommended transmission fluid change interval specified by Nissan. Use only the Nissan-approved CVT fluid. Using the wrong fluid can cause serious damage. Shorter intervals might be necessary under severe driving conditions (frequent towing, stop-and-go traffic, hot weather).
Avoid Aggressive Driving: Refrain from hard acceleration, frequent high-speed driving, and excessive towing.
Monitor for Symptoms: Be vigilant for any signs of transmission problems, such as juddering, slipping, or delayed engagement. Address these issues promptly to prevent further damage.
Transmission Cooler Installation: Consider installing an auxiliary transmission cooler, especially if the vehicle is frequently used for towing or in hot climates. This can help to dissipate heat and extend the life of the CVT.
Software Updates: Ensure that the vehicle has the latest software updates for the transmission control module (TCM). These updates can sometimes address known issues and improve performance.
Proper Inspection: During routine maintenance, thoroughly inspect the CVT for any signs of leaks or damage.

Future Trends

The automotive industry is constantly evolving, and transmission technology is no exception. Several trends are shaping the future of transmissions:

Increased Adoption of Hybrid and Electric Vehicles: Hybrid and electric vehicles often utilize single-speed transmissions or more advanced CVTs designed for electric motors.
Development of More Robust CVTs: Manufacturers are working to improve the durability and reliability of CVTs by using stronger materials, improved cooling systems, and more sophisticated control algorithms.
Shift Towards Automated Manual Transmissions (AMTs) and Dual-Clutch Transmissions (DCTs): These transmissions offer a blend of fuel efficiency and performance, providing quicker shifts and a more engaging driving experience.
Artificial Intelligence (AI) Integration: AI is being used to optimize transmission control, predict driver behavior, and improve overall efficiency and performance.

The future likely holds a diverse range of transmission technologies, each tailored to specific vehicle types and driving needs. While CVTs may continue to evolve, other options like AMTs and DCTs are gaining traction.

Conclusion

The 2017 Nissan Murano's CVT presents a mixed bag. While it offers potential fuel efficiency and smooth acceleration, its reliability has been a concern for some owners. Automotive professionals need to be aware of the common issues, maintenance requirements, and potential long-term costs associated with this transmission. By understanding the technical aspects and providing informed advice to customers, they can help to ensure that the CVT performs optimally and lasts as long as possible.

Looking ahead, the automotive industry is on the cusp of significant changes. The rise of electric vehicles and the development of new transmission technologies will reshape the landscape. Staying abreast of these trends will be crucial for automotive professionals to remain competitive and provide the best possible service to their customers.