Crossover owners Nissan Murano second generation, known in the body Z51, are often faced with the nuances of operating an all-wheel drive system. This car, produced between 2008 and 2014, has gained a reputation as a reliable but high-maintenance vehicle. The key component that ensures cross-country ability and stability on slippery roads is the transfer case integrated into the transmission.
Many car owners mistakenly believe that the all-wheel drive system is Murano Z51 works automatically without human intervention. In fact, the electronics constantly monitor wheel slip and redistribute torque. However, the mechanical part of the transfer case has a limited resource, which directly depends on the quality of the transmission fluid and driving style.
Ignoring the first signs of malfunction can lead to expensive major repairs or complete replacement of the unit. In this article we will analyze in detail the transfer case structure, typical faults, diagnostic methods and nuances of restoring functionality.
Design and principle of operation of the transfer case on the Nissan Murano Z51
Structurally, the transfer case is Nissan Murano Z51 is a compact unit that is combined with the main gear and differential. The system is part of the transmission, where the main torque distribution occurs through the all-wheel drive clutch. The electronic control unit constantly analyzes data from wheel speed sensors.
The key element is the electromagnetic clutch, which, if necessary, locks the differential or redirects torque to the rear axle. In normal driving mode, the car behaves like a front-wheel drive one, which saves fuel. If the front wheels lose traction, the system instantly activates the rear axle.
A feature of this design is the absence of a rigid connection between the axes in a static state. The force is transmitted due to the hydraulic pressure created inside the coupling. This ensures smooth operation, but creates a high load on the clutch pack and bearings during prolonged slipping.
Typical faults and symptoms of failure
The most common problem with distributors is Nissan Murano Z51 is wear of bearings and seals. Due to constant vibrations and high temperatures, sealing elements lose elasticity, which leads to transmission fluid leakage. Loss of oil causes overheating and accelerated gear wear.
The second most common cause of failure is overheating of the electromagnetic clutch. If you frequently drive in deep snow or mud, pushing the system to its limit, the clutch may overheat. This is often accompanied by the appearance of a specific burning smell and loss of traction on the rear wheels.
- 🔊 The appearance of a hum or howl when moving, which changes depending on the speed and load.
- 🚗 Vibration of the steering wheel or body, especially when accelerating from a stop.
- 💧 Traces of oil leaks under the car near the rear of the transmission.
Sometimes the problem lies not in the transfer case itself, but in the speed sensors. A faulty sensor can send an incorrect signal to the control unit, causing the system to constantly operate in emergency mode. This leads to rapid wear of the clutch friction discs.
Diagnostics and testing of the all-wheel drive system
Before disassembling the unit, it is necessary to conduct comprehensive computer diagnostics. Errors in the all-wheel drive system are often stored in the ECU memory, even if they occur sporadically. Use a scan tool to read trouble codes related to the ABS sensors and all-wheel drive system.
A visual inspection also provides a lot of information. Check the condition of the seals and the presence of oil traces on the transfer case housing. Pay attention to the condition of the driveshaft and its support, since play in these components can simulate a breakdown of the transfer case.
To check the operation of the coupling, you can perform a test on a lift. Start the engine, engage reverse gear and slowly ask an assistant to press on the gas. The rear wheels should begin to rotate smoothly, without jerking. If there is no rotation or it occurs with a delay, this is a sign of wear on the clutches.
- up to 100 thousand km
- 100-200 thousand km
- 200-300 thousand km
- more than 300 thousand km
Oil change procedure and maintenance
Regular replacement of transmission fluid is the key to a long life of the transfer case. Murano Z51. The manufacturer recommends changing the oil every 40-50 thousand kilometers, but with aggressive use this interval should be shortened. Use only original fluid NS-2 or high-quality analogues with CVT approval.
The replacement procedure is not complicated, but requires care. First, you need to warm up the gearbox so that the oil becomes less viscous and drains better. Then unscrew the drain plug, let the oil drain completely and replace the O-ring.
- 🛢️ Use original Nissan Matic S or NS-2 oil.
- 🔧 Replace the O-rings of the drain and filler plugs.
- 🧼 Clean the transfer case body from dirt before unscrewing the plugs.
It is important not to overfill the oil, as this can lead to squeezing out the seals and causing leaks. The level is checked through the filler hole: the liquid should be flush with the edge of the hole. If the oil is dark and has metal shavings, this is a sign of internal damage.
☑️ Preparing for an oil change
⚠️ Attention: Never operate a car with a low oil level in the transfer case, as this will instantly lead to gear scuffing and bearing failure.
Transfer case repair and restoration
If the diagnostics reveals mechanical damage, a major repair or replacement of the unit will be required. Often the problem is solved by replacing the bearings, seals and clutch pack. However, if the gears are heavily worn or chipped, it is easier to replace the entire unit with a contract one.
When making repairs, it is important to use high-quality spare parts. Cheap analogues of bearings may not withstand loads and fail after a short time. It is best to use original components or proven brands, such as Koyo or NSK.
After assembling the transfer case, be sure to run it in. For the first 500 kilometers, avoid sudden acceleration and towing a trailer. This will allow the parts to get used to and ensure stable operation of the system. If you have replaced the clutch, check its operation in different driving modes.
Transfer case repair cost
Changing the oil is inexpensive, about 3-5 thousand rubles. Repairs including replacement of bearings will cost 15-25 thousand rubles. A complete replacement of the transfer case with a contract one can cost from 40 to 70 thousand rubles, depending on the mileage and condition.
Before starting repairs, be sure to mark the position of the propeller shaft with a mark to avoid imbalance when reinstalling.
Modifications and differences of handouts
On Nissan Murano Z51 Transfer cases were installed depending on the engine type and year of manufacture. Models with the 3.5 liter V6 engine (VQ35DE) have slightly different gear ratio characteristics compared to earlier versions. This is important to consider when searching for spare parts.
There are also differences in the firmware of the control units. Some models have a four-wheel drive clutch locking function, which is activated by a button on the instrument panel. This feature is useful when driving on snow or sand, but is not intended for use on dry pavement.
| Parameter | Meaning |
|---|---|
| Drive type | Full (Intelligent 4WD) |
| Oil volume | 0.75 - 0.85 liters |
| Oil type | Nissan Matic S / NS-2 |
| Replacement interval | 40,000 - 50,000 km |
Owners with experience note that transfer cases of recent years of production (2012-2014) are slightly more reliable than earlier versions due to improvements in the clutch cooling system. However, the operating principle remains the same and the maintenance requirements are identical.
Regular oil changes and timely diagnostics are the best ways to avoid costly repairs to the transfer case on a Nissan Murano Z51.
Breakdown prevention and operating tips
To extend the life of the transfer case, extreme loads must be avoided. Do not use the vehicle for off-road racing or deep off-road use without proper training. All-wheel drive system Murano Z51 Designed for light off-roading and bad roads, and not for extreme off-roading.
When driving on snow or ice, try to avoid prolonged slipping. If the car is stuck, it is better to use a shovel or place stones under the wheels than to accelerate on the spot. This will save the clutch from overheating and burning out the friction clutches.
Monitor the condition of your tires. Different tread patterns or different tire wear on the axles puts stress on the differentials and transfer case. Try to change tires as a set on all four wheels to ensure the same rolling diameter.
⚠️ Attention: The use of wheels of different diameters (for example, due to wear or replacement with a non-standard size) can lead to constant engagement of the all-wheel drive clutch and its rapid failure.
If you are planning a long off-road trip, check the condition of the transfer case in advance. Make sure there are no oil leaks and the level is correct. Having a spare set of oil in the trunk will also not be superfluous.
FAQ: Frequently asked questions from owners
Is it possible to drive with a faulty transfer case?
Strongly not recommended. Driving with a faulty transfer case can cause the unit to seize, causing loss of control and a serious accident. It can also damage the driveshaft and rear axle.
How often does the Murano Z51 transfer case oil need to be changed?
The official recommendation is every 40-50 thousand kilometers. For active use in off-road conditions or frequent towing, it is better to reduce the interval to 30 thousand kilometers.
What are the most common symptoms of a breakdown?
The most common symptoms are bearing noise, vibration during acceleration and oil leaks through the seals. The all-wheel drive clutch also often overheats.
Is it possible to replace the transfer case yourself?
Replacing the transfer case requires special tools and skills. Without experience working with transmissions, it is better to entrust this work to professionals, since incorrect installation can lead to new breakdowns.
What is the warranty for transfer case repairs?
The warranty depends on the service and spare parts used. Typically, work is guaranteed for 3 to 6 months, and original spare parts are guaranteed for 1 year.