Car Nissan Murano the second generation (Z50 body) has earned a reputation as a comfortable crossover with a smooth ride, largely thanks to the transmission. The heart of this transmission is a continuously variable transmission, which provides continuously variable gear ratios. However, owners often face questions about the reliability and service life of this unit, especially with a mileage of over 100,000 kilometers.
Many people mistakenly believe that a CVT is an eternal gearbox that does not require attention. In fact CVT (Continuously Variable Transmission) from Jatco is a high-precision mechanism that is sensitive to oil quality and operating conditions. Understanding of operating principles and knowledge of typical weak points Nissan Murano Z50 This will help you avoid costly repairs and keep your car in working condition for many years.
Design and principle of operation of the Jatco JF011E variator
On the model Nissan Murano Z50 Jatco JF011E series unit (also known as RE0F10A) is installed. This is a hydromechanical transmission, where instead of the usual gears, two bevel pulleys and a metal belt are used. One pulley is connected to the engine, the other to the wheels. By changing the diameter of the working surfaces of the pulleys, the system smoothly changes the gear ratio.
The key element is metal belt, consisting of many steel plates and cables, which transmits torque. The pressure in the valve body is regulated by an electronic control unit (ECU), which constantly analyzes the speed of rotation of the shafts and the load. It is the complexity of this system that makes it vulnerable to overheating and contamination.
It's important to note that Jatco JF011E has a built-in torque converter (donut), which acts as a clutch when starting and reduces vibrations. However, the variator itself does not have friction clutches, as in a classic automatic transmission, which changes the approach to diagnostics and maintenance. Hydraulic unit is the “brain” of the system, distributing oil through the channels to control the pulleys.
Typical faults and their symptoms
CVT resource for Nissan Murano Z50 highly depends on driving style and regularity of maintenance. The most common problem is wear on the pulley cones. You can notice this by the appearance of vibrations during acceleration, which feel like bumps or jolts. This is a sign that the belt is starting to slip, and the metal of the cones is already worn out.
The second critical unit is the hydraulic unit. Over time, wear products accumulate in the oil, which clog thin channels and solenoids. This leads to unstable pressure, jerking and kicking when switching driving modes. If you feel that the car does not accelerate as before, and the tachometer needle “jumps” when you press the gas, this is an alarming signal.
Overheating cannot be ignored either. CVT cooling system Murano Z50 often works to the limit in dense city traffic. Overheated oil loses its properties, which leads to rapid wear of bearings and seals. Critical oil temperature above 120 degrees Celsius irreversibly destroys the friction linings of the torque converter and changes the structure of the metal.
- 🚨 Vibration when accelerating at speeds of 40-80 km/h
- ⚙️ Jerks and kicks when switching D/R modes
- 🌡️Check Engine light comes on with oil pressure codes
- 🔊 Extraneous hum or howl from under the hood
Owners often confuse CVT symptoms with engine or suspension problems. However, the characteristic sound of a working variator is a smooth hum, changing tone depending on the load. If the sound changes to grinding or knocking, repair is necessary immediately, otherwise the consequences will be fatal.
- Up to 100,000 km
- 100,000 - 200,000 km
- More than 200,000 km
- I don't know the exact mileage
Diagnosis and reading errors
To accurately assess the condition of the transmission, it is necessary to conduct computer diagnostics. A standard scanner can only show general codes, but the Jatco CVT requires specialized equipment or a dealer scanner. Errors are often duplicated and may be temporary, so it is important to look at recording history and parameters in real time.
Particular attention should be paid to codes related to oil pressure (for example, P0840, P0841) and belt slippage. These codes indicate that the system cannot maintain the required force to hold the belt on the pulleys. In this case, a simple oil change will no longer help; repair or replacement of the unit will be required.
During diagnostics, the level and condition of the transmission fluid is also checked. On Murano Z50 There is a control hole for draining, through which you can evaluate the color and presence of metal shavings. Black oil with a burnt smell is a sure sign that the internal components are already very worn out.
What do CVT error codes mean?
P0840 - Transmission oil pressure is too low. P0841 - Incorrect behavior of the pressure sensor. P2714 - Pressure solenoid malfunction. P0868 - Low transmission fluid pressure. These codes require immediate inspection of the valve body and pump.
Maintenance rules and oil change
The manufacturer claims a “maintenance-free” gearbox, but this is a marketing ploy. In fact, changing the oil in the variator Nissan Murano Z50 should be carried out every 60,000 kilometers. You need to use only original liquid Nissan CVT Fluid NS-2 or its high-quality analogues certified to this standard.
The replacement procedure is often performed using a partial replacement method followed by filter replacement. A deep replacement through the hardware method is not recommended at high mileage, since new oil can wash away dirt and clog the valve body channels. It is better to do this in several stages, draining the old oil and filling in new oil.
It is important to change not only the fluid, but also the filter. The coarse mesh filter becomes clogged with chips, and the fine paper element loses its properties. Ignoring filter replacement leads to a drop in pressure and rapid failure of the hydraulic pump. Filter is a consumable item that cannot be washed or reused.
☑️ Preparing to change the oil in the variator
Some experts recommend adding additives to restore the properties of the oil, but this is a controversial method. In Jatco precision machinery, chemical additives can disrupt the friction balance and cause even greater problems. It is better to adhere to strict regulations for replacing original fluids.
Regularly changing the oil and filter is the only way to extend the life of the Jatco JF011E variator without major repairs.
Major repairs and replacement of the unit
If diagnostics reveal critical damage to the cones or belt, a major overhaul will be required. During the repair process, the pulleys are polished (if the wear is not critical) or the set of pulleys and belt is replaced. The valve body, solenoids and all sealing elements must also be changed.
An alternative to a major overhaul is the installation of a contract unit. This is a used CVT removed from a car in Japan or Europe. It is important to choose a contract option with a guarantee and verified mileage. Installing a used unit requires careful preparation: flushing all lines and changing the oil.
The new original CVT is the most reliable, but also the most expensive option. For Nissan Murano Z50 the cost of a new unit can be comparable to the cost of the car itself on the secondary market. Therefore, most owners choose repair or contract replacement.
| Solution option | Cost (guideline) | Service life | Risks |
|---|---|---|---|
| Major renovation | Average | 100-150 thousand km | Depends on the quality of spare parts and the technician |
| Contract unit | Low/Medium | 50-100 thousand km | Unknown actual mileage |
| New original | High | 200+ thousand km | Minimum |
| Replacing the belt and cones | Low | Short term | High probability of repeated failure |
⚠️ Attention: Never start the engine until the oil level is completely checked after changing. Overheating can occur in minutes if the level is critically low.
When repairing, you should also pay attention to the torque converter. If there is wear on the clutches or damage to the impeller, it must be replaced or rebuilt. Owners often skimp on this unit, which leads to re-contamination of freshly filled oil with wear products.
When purchasing a contract CVT, be sure to request a video of the unit operating on a stand before dismantling it from the car.
Ways to extend transmission life
To keep the variator on Nissan Murano Z50 served longer, you need to change your driving style. Avoid sudden starts and slipping, as this creates peak loads on the belt. Smooth pressing of the gas pedal is the key to long life of the pulleys. Also, do not tow other vehicles or heavy trailers, as this will overload the transmission.
In winter, be sure to warm up the engine and transmission before driving. Cold oil is thick and cannot provide the necessary pressure in the system. Drive at low speeds for the first 10-15 minutes until the oil temperature reaches operating values. This is especially important in frosts below -10 degrees.
If you often sit in traffic jams, use D mode with the brake held, or switch to N for long stops. Holding the vehicle in D mode for a long time with the brake pedal pressed creates an extra load on the torque converter and increases the oil temperature. However, it is not recommended to shift into N while driving, as this may result in a loss of pressure.
- 🛑 Avoid slipping in snow or mud
- ❄️ Warm up the transmission in winter to 40-50 degrees
- 🚫 Don’t use kick-down mode all the time
- ⏱️ Take breaks when driving for a long time in traffic jams
⚠️ Attention: The "kick-down" mode (full pressing of the gas pedal) creates maximum pressure in the system. Frequent use of this mode on cold oil leads to accelerated belt wear.
Specifics of operation in urban conditions
The urban rhythm of life is the most difficult mode for the CVT. Constant starts, stops and switches create thermal stress. On Murano Z50 The CVT cooling system is integrated into the engine radiator, and in hot weather it may not cope with heat removal.
It is recommended to install an additional variator cooling radiator if you plan long trips in the heat or frequent driving in heavy traffic. This is a simple and effective way to reduce oil temperature and extend the life of the unit. The additional cooling circuit pays for itself by reducing the frequency of repairs.
It is also worth monitoring the condition of the engine cooling system, since the temperature of the oil in the variator directly depends on it. A clogged radiator or faulty fan can cause the entire transmission to overheat. Regularly check the antifreeze level and cleanliness of radiators.
An additional cooling radiator is the best solution to protect the variator from overheating in city traffic jams.
Frequently asked questions from owners
What is the resource of the variator on the Nissan Murano Z50?
With timely oil changes and careful driving, the service life can reach 200,000 - 250,000 kilometers. However, in practice, many owners are faced with the need for repairs after 120,000 kilometers.
Is it possible to change the oil using the complete 置换 method (hardware change)?
At a mileage of more than 150,000 km, hardware replacement is not recommended, as old dirt can clog the valve body. It is better to do a partial replacement 3-4 times at intervals of 1000 km.
What to do if the variator starts to vibrate?
Vibration usually indicates wear on the pulley cones. It is necessary to immediately seek diagnostics. If the wear is small, sometimes changing the oil and adapting helps, but more often pulley repairs are required.
What oil is better to fill in the variator?
The best choice is original oil Nissan CVT Fluid NS-2. Analogues are allowed only if there is an official certificate of compliance with the NS-2 standard.
Is it possible to drive in slip mode with a CVT?
Absolutely not. Slipping leads to instant overheating and belt slippage, which can destroy the unit in a few seconds. Use 4WD Lock mode to get out of mud, but don't abuse it.