All-wheel drive transmission Nissan Murano The first generation (Z50 body) is a complex and technologically advanced unit that requires regular maintenance. The transfer case (RCD), which distributes torque between the axles, operates under conditions of high temperatures and loads, so the quality of lubrication is critical here. Ignoring routine maintenance can lead to failure of the front axle coupling and costly repairs.
Many owners mistakenly believe that the transfer case is on Nissan maintenance-free, but this is not the case. The absence of a visible dipstick and the specific location of drain plugs often mislead inexperienced car owners. A timely oil change in the Z50 transfer case will preserve the elasticity of the rubber seals, ensure smooth operation of the differential and avoid the characteristic hum when driving.
Why is it important to maintain your Z50 transfer case?
Transfer case (RCD) in a crossover Nissan Murano The Z50 is a compact, full-time all-wheel drive machine with a multi-plate clutch as its core element. Inside this unit there are gears and bearings, which are subject to significant friction during operation. Oil performs not only the function of lubrication, but also removes heat from hot components, preventing overheating.
Over time, transmission fluid loses its properties: additives are washed out, and metal wear product accumulates in the form of metal shavings. If not produced oil change, the viscosity of the lubricant will change, which will lead to insufficient lubrication of the friction pairs. This is especially dangerous for the front axle coupling, which can simply “sour” or begin to overheat during active driving.
In addition, acidic compounds are formed in old oils, which have an aggressive effect on rubber seals and O-rings. Loss of transfer case tightness often occurs precisely for this reason. Regular maintenance helps maintain the integrity of all internal seals and extend the life of the unit significantly.
Choosing the Right Transmission Fluid
For Nissan Murano Z50 manufacturer recommends the use of specific fluids designed specifically for transmissions with an all-wheel drive clutch. Conventional mineral or semi-synthetic oils for gearboxes are absolutely not suitable here, since they are not able to work under conditions of high shear rates inside the coupling.
The optimal choice would be the original liquid Nissan ATF Matic S or specialized lubricant Nissan Transfer Fluid. It is also acceptable to use high-quality analogues from manufacturers, such as Idemitsu or Castrol, but only if it meets specification J3 or J4. An error in choosing a fluid can lead to clutch slipping and loss of traction on the front axle.
The volume of oil required for a complete change is approximately 0.8–0.9 liters. Therefore, you need to buy at least one 1-liter canister, and preferably two, in order to have a reserve for refilling or rinsing. Please note that some owners use ATF Dexron III, but this is a compromise option that is only suitable for old units without signs of wear.
- According to regulations (every 60 thousand km)
- Once every 30-40 thousand km
- Only when there is noise
- Never changed
Necessary tools and preparatory work
Before starting work, it is necessary to prepare the workplace and tools. To access the transfer case drain and fill plugs, you will need to remove the engine crankcase protection, which is on Nissan Murano Z50 covers the bottom of the units. It is also worth preparing a container for draining used oil, since its volume can be significant.
You will need a set of keys including hexagons (usually 6 mm) or heads corresponding to the size of the transfer case plugs. To fill in new oil, you will need a special syringe or flexible hose with a funnel, since the filler hole is located in a hard-to-reach place. Don't forget about new sealing washers for the plugs.
The car must be lifted on a lift or placed on a pit, ensuring reliable fixation with a parking brake and wheel supports. It is important that the machine is positioned strictly horizontally, otherwise the oil level will be measured incorrectly. If the machine is parked on a slope, filling will occur with an error, which will lead to insufficient lubrication of the components.
☑️ Preparing for an oil change
The process of draining waste fluid
The first step is to warm up the transfer case to operating temperature. This can be done by driving 10–15 kilometers at a leisurely pace. Warm oil has a lower viscosity and drains better, taking with it a suspension of metal shavings and additive decomposition products.
Locate the drain plug on the bottom of the transfer case. It is usually located on the right or left side depending on the year of manufacture. Unscrew the cap carefully, placing a previously prepared container. Be prepared for the fact that oil may escape under pressure, especially if the plug has been tightened previously.
During the draining process, pay attention to the condition of the magnet, if there is one on the plug (on some modifications). If a lot of metal shavings have accumulated on the magnet, this is an alarming sign of internal wear. Metal shavings in oil indicates that the bearings or gears are operating in emergency mode.
What to do if the plug does not unscrew?
If the cork is stuck, do not try to rip it off with a jerk. Use penetrating lubricant (WD-40), give it time to work, and then try to unscrew it through a wrench or extension. If the head is licked off, use an extractor or carefully drill out the plug, first protecting the tray from metal shavings.
Filling with new lubricant and checking the level
After completely draining the old oil, it is necessary to clean the seat of the drain plug and install a new sealing washer. Screw the plug back, but do not tighten it all the way, as the transfer case housing may be aluminum and is easily deformed. The tightening torque is usually around 30–40 Nm.
Next, proceed to filling in new oil. Open the filler hole located on the side wall of the transfer case. You need to pour fresh liquid through it until it starts flowing back out. This is the correct oil level in the transfer case Nissan Murano Z50. Oil should come out of the filler hole in a trickle or drip when the machine is parked on a level surface.
Use a syringe or flexible hose to supply oil. If you are using a canister with a spout, make sure the spout fits snugly into the opening. Fill slowly to avoid the formation of air pockets inside the unit. Once filled, install the filler plug with a new washer and tighten it securely.
Before adding oil, make sure that the drain plug is screwed in perfectly tightly and is not leaking. If you fill in new oil and then discover a leak in the drain, you will have to drain everything again and waste an expensive fluid resource.
Diagnostics and testing after replacement
After completing the work, you need to start the engine and let it idle for 3-5 minutes. At this time, the oil will be distributed throughout all channels, filling the torque converter (if it is connected to the transfer case) and oil seals. Inspect the plug installation locations for leaks.
Take a test drive, accelerating and braking smoothly. Pay attention to extraneous sounds from the transfer case: hums, vibrations or clicks may indicate an incorrect oil level or a malfunction. If the sound becomes quieter and the transmission operates smoother, the operation was successful.
After 500–1000 kilometers, it is recommended to re-check the oil level and the condition of the drain plug. Sometimes sealing washers shrink after the first use and require tightening. This is standard practice for all transmission components operating in vibration environments.
The correct oil level in the transfer case is determined by the fact that liquid flows out of the filler hole when the car is in a horizontal position.
Oil compatibility and characteristics table
To make it easier to select transmission fluid, below is a table of oil compatibility with transfer case Nissan Murano Z50. The choice depends on operating conditions and owner preferences, but all listed options must meet the manufacturer's requirements.
| Oil type | Specification | Filling volume (l) | Recommended interval (km) |
|---|---|---|---|
| Original Nissan ATF Matic S | J3 / J4 | 0.85 | 60 000 |
| Idemitsu ATF Type-812 | J3 / J4 | 0.85 | 50 000 |
| Castrol Transmax Import Multi | ATF III / IV | 0.85 | 45 000 |
| Motul ATF Multi Vehicle | ATF III / IV | 0.85 | 40 000 |
⚠️ Attention! Do not mix oils of different manufacturers and types, as the chemical composition of the additives may be incompatible. This will lead to sedimentation and rapid failure of the coupling.
⚠️ Attention! If, when draining, you find a large amount of magnetic shavings or metal dust in the oil, before adding new fluid, you need to rinse the transfer case or contact a specialist to diagnose the condition of the bearings.
⚠️ Attention! It is strictly prohibited to use GL-5 engine oil or transmission oils for the transfer case of the Nissan Murano Z50. This is guaranteed to lead to the destruction of the all-wheel drive clutch clutches.
Frequently asked questions and answers
How often do you need to change the oil in the transfer case on a Murano Z50?
The recommended replacement interval is 60,000 km or 4 years of operation. However, for active off-road driving or in frequent traffic jams, the interval should be reduced to 40,000 km. Regular replacement prevents overheating of the coupling and wear of the gears.
Is it possible to change the oil in the transfer case yourself?
Yes, the procedure for changing the oil in the Z50 transfer case is quite simple and does not require complex equipment. The main thing is to ensure access to the underside of the car, have the right tools and new fluid. However, if you are not confident in your abilities, it is better to entrust this to professionals.
What happens if you don’t change the oil in the transfer case?
Failure to change the oil will lead to the accumulation of metal shavings, overheating of the all-wheel drive clutch and its jamming. In the worst case, gears and bearings may fail, which will require major repairs or replacement of the entire transfer case.
How to check the oil level in the transfer case without a dipstick?
The level is checked through the filler hole. The car must be parked on a level surface. If oil begins to flow out of the filler hole when the plug is unscrewed, the level is normal. If the oil does not flow out, it is necessary to add until a trickle appears.
Is it necessary to warm up the transfer case before changing the oil?
Yes, warming up to operating temperature is required. Warm oil has a lower viscosity and flows out better, taking wear products and dirt with it. Cold oil drains slowly and leaves some contaminants inside the unit.