The Nissan Murano is known for its comfortable ride and strong V6 engine performance, but some model years have experienced transmission-related issues, particularly those equipped with Nissan's Continuously Variable Transmission (CVT). Understanding the symptoms, causes, and repair solutions can help vehicle owners prevent severe damage and extend transmission life.
Common Nissan Murano Transmission Problems
One of the most frequently reported issues is transmission slipping. Drivers may notice delayed acceleration, engine RPM fluctuations, or a feeling that the transmission is struggling to maintain power. In many cases, the vehicle may hesitate when accelerating from a stop or while merging onto highways.
Another common problem is CVT overheating. Excessive heat can cause the transmission to enter a fail-safe mode, resulting in reduced power and poor vehicle performance. Overheating is often more noticeable during long-distance driving, towing, or operation in hot climates.
Shuddering and vibration during acceleration are also common symptoms. The vehicle may shake, vibrate, or produce a jerking sensation when the CVT attempts to adjust its gear ratio. This condition can indicate internal belt wear, pulley damage, contaminated fluid, or valve body issues.
Drivers may also experience delayed engagement when shifting into Drive or Reverse. The transmission may take several seconds to respond after selecting a gear, which often indicates internal hydraulic pressure problems, worn components, or valve body malfunctions.
In severe cases, complete transmission failure can occur. Warning signs include grinding noises, transmission warning lights, inability to accelerate, and the vehicle entering limp mode.
Main Causes of Nissan Murano Transmission Failure
CVT fluid deterioration is one of the leading causes of transmission problems. Over time, transmission fluid loses its lubrication and cooling properties, increasing friction and internal wear. Dirty or degraded fluid can damage bearings, pulleys, belts, and hydraulic components.
Overheating is another major factor. High operating temperatures accelerate fluid breakdown and cause premature wear of internal transmission parts. A clogged transmission cooler or cooling system malfunction can worsen this condition.
Valve body failure is commonly found in high-mileage Murano models. The valve body controls hydraulic pressure throughout the transmission. When solenoids or internal passages fail, shifting performance becomes erratic and transmission operation deteriorates.
Worn CVT belts and pulleys can also create slipping, vibration, and acceleration issues. Since the CVT relies on precise belt and pulley operation, even minor wear can significantly affect performance.
Electronic control failures, including defective sensors, wiring issues, or Transmission Control Module (TCM) problems, may trigger warning lights and abnormal shifting behavior. Faulty input speed sensors, output speed sensors, and pressure sensors are common contributors.
Professional Diagnostic Procedure
A technician typically begins by scanning the vehicle for Diagnostic Trouble Codes (DTCs) using a professional scan tool. Codes related to transmission pressure, temperature, speed sensors, or solenoid performance provide valuable information regarding the root cause.
The next step involves inspecting CVT fluid condition. Healthy fluid should appear clean and have a consistent color. Burnt-smelling, dark, or contaminated fluid often indicates overheating or internal wear.
Road testing is then performed to evaluate acceleration performance, transmission response, vibration, slipping, and operating temperatures. Live data from the transmission control system is monitored throughout the test.
Additional inspections may include transmission pressure testing, valve body evaluation, sensor verification, wiring inspection, and cooler flow testing to identify mechanical or electrical failures.
How to Fix Nissan Murano Transmission Problems
For minor transmission performance issues, a complete CVT fluid service may restore proper operation. The old fluid is drained, the system is cleaned if necessary, and genuine Nissan CVT fluid is installed according to factory specifications. Using incorrect fluid can lead to further transmission damage.
If overheating is detected, technicians should inspect the transmission cooler, radiator, cooling fans, and coolant system. Replacing a restricted cooler or installing an auxiliary transmission cooler may help reduce operating temperatures and improve reliability.
When valve body failure is confirmed, replacement of the valve body assembly is often required. After installation, transmission programming and adaptation procedures may be necessary to ensure proper operation.
Faulty sensors, damaged wiring, or TCM issues should be repaired or replaced following diagnostic confirmation. Clearing trouble codes without correcting the underlying problem usually results in recurring symptoms.
If the CVT belt, pulleys, bearings, or internal components are severely worn, a complete transmission rebuild or replacement may be the most effective solution. In many cases, replacing the transmission assembly is more economical and reliable than extensive internal repairs.
Preventive Maintenance Recommendations
Regular transmission maintenance is essential for maximizing CVT lifespan. Although some manufacturers advertise "lifetime" transmission fluid, many transmission specialists recommend replacing CVT fluid every 30,000 to 60,000 miles (48,000 to 96,000 km), depending on driving conditions.
Drivers should avoid aggressive acceleration, excessive towing beyond vehicle specifications, and prolonged operation under extreme heat conditions. Monitoring transmission temperature and addressing warning lights immediately can prevent costly repairs.
Routine inspections of transmission fluid condition, cooling system performance, and electronic control systems help identify potential problems before major failures occur. With proper maintenance and early diagnosis, many Nissan Murano transmission issues can be corrected before requiring complete transmission replacement.