Transfer case Nissan Murano Z50: how it works, typical problems and their solutions

Transfer case (handout) in Nissan Murano Z50 (2008–2014) - a key component of the all-wheel drive transmission, responsible for distributing torque between the axles. This crossover, built on the platform Nissan D, equipped with a system All-Mode 4×4-i electronically controlled, which made its behavior on the road predictable, but at the same time demanding of maintenance. Owners Murano Z50 often encounter transfer case problems after 150–200 thousand kilometers, when wear of parts leads to vibrations, hum or complete failure of the system.

In this article we will analyze the transfer case device Murano Z50, typical symptoms of malfunctions, diagnostic and repair methods, as well as the nuances of changing the oil, which many people miss. We will pay special attention electronic control unit (ECU) transfer case - its failures are often disguised as mechanical failures. If you notice that your Murano starts to “twitch” when switching modes or makes strange sounds at speed - this information will help you avoid costly repairs.

Murano Z50 transfer case design: diagram and principle of operation

Transfer case Nissan Murano Z50 integrated with the rear of the gearbox and represents single-casing unit with electronic control. Unlike classic transfer cases with manual switching (as in Patrol or Pathfinder), the system used here is All-Mode 4×4-i, which automatically distributes traction between the axles depending on driving conditions. Main components:

• 🔧 Haldex coupling (wet type) - responsible for connecting the rear axle. B Murano Z50 coupling is used 5th generation, which is controlled by an electronic unit through a hydraulic circuit.
• 📊 Electronic control unit (ECU) — analyzes data from ABS sensors, steering angle, throttle and distributes torque among the axes. In emergency mode, it can disable the rear axle.
• ⚙️ Planetary gearbox - reduction gear (in Murano Z50 there is no “lowering”, but the gearbox participates in torque distribution).
• 🛢️ Oil pump — provides pressure in the clutch hydraulic system. Its malfunction leads to “slippage” of the rear axle.

The system operates in three main modes:

1. 2WD — front-wheel drive (rear axle disabled to save fuel).
2. AUTO — automatic connection of the rear axle when slipping (up to 50% of the torque can be transmitted backwards).
3. LOCK — hard locking (50/50 torque distribution, used off-road or when towing).

Important: in mode LOCK speed limited 40 km/h — when exceeded, the system automatically switches to AUTO. This protects the coupling Haldex from overheating.

Signs of a malfunctioning Murano Z50 transfer case: when to sound the alarm

Transfer case problems Murano Z50 appear gradually, and many owners attribute the first symptoms to “car features.” However, ignoring the following signs leads to complete failure of the Haldex coupling or electronic unit, which costs 150–300 thousand rubles for repairs:

• 🔊 Hum or howl from the transfer case at a speed of 60–90 km/h - indicates wear of the bearings or lack of oil.
• ⚡ Jerks when switching modes (especially with 2WD on AUTO) - a problem with the coupling or sensors.
• 🚗 Automatic rear axle disengagement (lights up on the dashboard 4WD ERROR) - ECU failure or oil pump failure.
• 💦 Oil leak from under the transfer case - damage to the seals or a crack in the housing.
• 🔄 Inability to enable LOCK mode - often associated with wear of the coupling or breakage of the sensor wiring.

⚠️ Attention: If a message appears on the dashboard Service 4WD System, immediately check the oil level in the transfer case. Further operation without diagnostics will lead to Haldex coupling jamming and repairs costing from 200 thousand rubles.

One of the most insidious symptoms is uneven tire wear. If the rear wheels wear out faster than the front wheels, this may indicate that the rear axle is permanently connected due to a faulty clutch. You can check this by lifting the car on a lift and rotating the wheels manually: in the 2WD the rear ones should rotate freely, without resistance.

Symptom	Probable Cause	Repair cost (approx.)
Rumble at speed	Transfer case bearing wear	20–50 thousand rubles.
Jerks when switching modes	Faulty Haldex coupling or sensors	80–150 thousand rubles.
Oil leak	Damage to seals or housing	10–30 thousand rubles.
Error 4WD ERROR	ECU or oil pump failure	50–200 thousand rubles.

Diagnostics of the Murano Z50 transfer case: where to start?

If you notice one of the symptoms listed above, the first thing you should do is check the oil level and condition in the transfer case. B Murano Z50 special liquid is used Nissan Matic S ATF (article KE908-99932), which needs to be changed every 60–90 thousand km. Neglecting this procedure is the main reason for premature coupling wear. Haldex.

To diagnose yourself, follow these steps:

Check the oil level through the inspection hole (should be at the level of the lower edge)|Inspect the transfer case for leaks (especially at the junction with the gearbox)|Test mode switching (2WD → AUTO → LOCK) on a flat surface|Check for errors via the OBD-II scanner (codes P1700–P1799 refer to the transmission)|Listen to the operation of the transfer case while driving (hum, knocking, vibration)-->

For in-depth diagnostics, you will need a scanner that supports the protocol Nissan Consult (For example, Launch X431 or Autel MS906). The most common errors related to distribution:

• P1700 — malfunction of the transmission control circuit.
• P1705 — problem with the transfer case position sensor.
• P1710 — discrepancy between the wheel speed sensor signals (may indicate clutch wear Haldex).
• C1105 - malfunction of ABS, which affects torque distribution.

If the scanner shows errors related to Transfer case ECU, do not rush to change it. Often the problem lies in oxidized contacts block or damaged wiring. For example, in Murano Z50 There is a common problem with the connector of the oil temperature sensor in the transfer case - its corrosion leads to false alarms in the emergency mode.

Changing the oil in the Murano Z50 transfer case: step-by-step instructions

Oil in transfer case Murano Z50 - this is blood system. Its aging leads to jamming of the coupling Haldex, bearing wear and overheating. The manufacturer recommends replacement every 90 thousand km, but in Russian conditions (dust, temperature changes, aggressive driving style) it is better to reduce the interval to 60 thousand km.

To replace you will need:

• 🛢️ Oil Nissan Matic S ATF — 4.5 liters (article KE908-99932).
• 🔧 Key on 10 mm And 24 mm (for drain plug).
• 🧤 Gloves and container for working out.
• 🔧 Torque wrench (torque for tightening plugs - 35–45 Nm).

Step by step process:

1. Warm up the car to operating temperature (the oil will become less viscous).
2. Lift up Murano on a lift or drive it into a pit. Remove the crankcase protection (if equipped).
3. Unscrew the drain plug (bottom of the transfer case) and drain the old oil. Pay attention to the presence of metal shavings - this is a sign of wear on the bearings.
4. Tighten the drain plug and pour new oil through the filler hole (top of the transfer case) until it begins to flow back out.
5. Start the engine and switch all transfer case modes one by one (2WD → AUTO → LOCK), holding each for 10 seconds. This will help the oil distribute evenly.
6. Check the level again and top up if necessary.

⚠️ Attention: Never use multigrade gear oils (e.g. GL-5) instead of the original Nissan Matic S. coupling Haldex requires a special fluid with certain friction properties. Replacing with an analogue will lead to clutch slippage and its accelerated wear.

What happens if you don’t change the oil in the transfer case?

Long-term operation with old fluid leads to the following:

1. Haldex coupling overheating — the oil loses its lubricating properties, the clutches burn out.

2. Bearing wear — metal shavings clog the oil channels, which leads to oil starvation.

3. Transfer case jammed — in critical cases, the clutch is blocked in one position, which makes the car uncontrollable.

4. ECU failure - the electronic unit may fail due to overheating or a short circuit in the sensors.

Repairing the Murano Z50 transfer case: what can you do yourself?

Not all transfer case breakdowns Murano Z50 require a service call. For example, replacing seals, cleaning ECU contacts or flushing the oil pump You can do it yourself with minimal tools. However, clutch repair Haldex or replacing the bearings will require disassembling the transfer case and specialized equipment.

Let's look at the most common problems and how to fix them:

Problem	Reason	Solution
Oil leak from transfer case	Shank seal wear	Replacing the oil seal (part number 38340-4M000). The cost of the part is 1–2 thousand rubles.
Error 4WD ERROR when LOCK is turned on	Oxidation of transfer case position sensor contacts	Cleaning the contacts or replacing the sensor (part number 32501-4M000).
Noise at speeds of 80+ km/h	Shank bearing wear	Replacing the bearing (requires disassembling the transfer case). The cost of the work is 15–30 thousand rubles.
Jerking when switching to AUTO	Haldex clutch oil filter is dirty	Flushing the system or replacing the coupling (from 80 thousand rubles).

If the transfer case requires serious repairs (for example, replacing the clutch Haldex), many owners are faced with a dilemma: restore the old transfer case or buy a contract one. It is important to consider here that contract distribution from Japan or the USA will cost 150–250 thousand rubles., and major renovation with the replacement of all worn parts - in 100–180 thousand rubles.. In this case, the repair allows you to install reinforced bearings and updated clutch, which extends the resource of the node.

Tuning and modernization of the Murano Z50 transfer case

Owners Murano Z50Those who operate their vehicle in difficult conditions (off-road, towing trailers) often think about upgrading the transfer case. Standard system All-Mode 4×4-i is not designed for long-term loads, and its weak points are:

• 🔥 Haldex coupling overheating when driving for a long time in LOCK.
• ⚙️ Bearing wear when towing heavy trailers.
• 📉 Insufficient torque distribution on slippery surfaces (for example, ice).

There are several ways to improve the reliability of the transfer case:

1. Installing an additional oil cooling radiator (article 21500-4M000). This reduces the coupling temperature Haldex by 20–30°C and extends its service life.
2. Changing oil to synthetic with improved friction properties (for example, Motul Multi ATF). Important: this oil must be compatible with the original Nissan Matic S.
3. ECU upgrade by flashing. Some workshops offer a software update that improves the torque distribution algorithm (for example, it connects the rear axle faster when slipping).
4. Installing differential lock (for extreme off-road use only). B Murano Z50 this requires serious modifications to the transmission and is not recommended for everyday use.

One of the most effective and affordable options is changing the oil to a specialized one for couplings Haldex (For example, Febi 26180 or Pentosin FFL-2). Such fluids have a higher viscosity index and better protect clutches from wear. However, before replacing it is necessary completely flush the system, since mixing different types of oils can lead to the formation of deposits.

Frequently asked questions about the Murano Z50 transfer case

Is it possible to drive with a faulty transfer case?

Short-term - yes, but only in mode 2WD (front wheel drive). However, ignoring the problem will lead to accelerated wear of the front transmission (CV joints, differential) and possible jamming of the transfer case. If the dashboard lights up 4WD ERROR, it is recommended to carry out a diagnosis as soon as possible.

How much does it cost to replace a Haldex clutch in a Murano Z50?

Cost of a new coupling Haldex 5th generation for Murano Z50 - from 60 to 120 thousand rubles. (depending on the manufacturer). Replacement work will cost 30–50 thousand rubles.. Total: 90–170 thousand rubles.. An alternative is to install a contract coupling (from 40 thousand rubles.), but its resource can be unpredictable.

What kind of oil should I put in the Murano Z50 transfer case?

Only original Nissan Matic S ATF (article KE908-99932) or its certified analogues: Mobil ATF 3309, Idemitsu ATF Type-M. Refill volume - 4.5 liters. Use of other oils (eg Dexron III or GL-5) will lead to failure of the coupling Haldex.

Why doesn't the Murano Z50 transfer case switch to LOCK mode?

There are several reasons:

• Transfer case position sensor malfunction (needs replacement or cleaning of contacts).
• Clutch wear Haldex (diagnostics on the stand is required).
• Failure in the ECU (try resetting errors through a scanner).
• Oil level is low or dirty (check and replace if necessary).

Start by checking the oil and reading errors.

Can a Murano Z50 with a faulty transfer case be towed?

If the transfer case is locked in mode LOCK, towing is only possible with a rigid coupling at a speed of no more than 50 km/h and at a distance to 50 km. If the transfer case is in mode 2WD, towing is allowed without restrictions (as for a front-wheel drive vehicle). In any case, it is recommended to disconnect the driveshaft to avoid damage to the transmission.