Choosing the right transmission fluid for Nissan Murano second generation (body Z51) is a critical aspect of vehicle operation, especially given its complex powertrain with intelligent all-wheel drive. Many owners mistakenly believe that changing the oil in the transfer case or rear gearbox is not as important as changing the engine oil, but it is these components that take on enormous loads when switching driving modes.
In this article we will analyze in detail the technical requirements for lubricants, specifications API GL-5, which is mandatory for the gearbox, and we will also provide step-by-step instructions for self-replacement. Ignoring routine maintenance can lead to accelerated gear wear and costly differential repairs.
Particular attention should be paid to the fact that the all-wheel drive system Nissan very sensitive to fluid viscosity and composition. Using the wrong oil can cause the clutch to slip or the gearbox to overheat in difficult driving conditions. We will look at how to correctly determine the volume of liquid to be filled and what tools are needed for quality maintenance.
Technical requirements and specifications of lubricants
Rear gearbox Nissan Murano Z51 works under conditions of high mechanical loads and temperature changes. To ensure the durability of the unit, the manufacturer insists on using specific gear oils that meet strict quality standards. The main selection criterion is tolerance API GL-5, which guarantees the presence of the necessary extreme pressure additives for hypoid gears.
Viscosity characteristics play no less important role than the chemical composition. Official Specification Nissan requires the use of fluids with a viscosity 75W-85 or 75W-90 depending on climatic operating conditions. The use of oils with other characteristics may disrupt the operating mode of the pump and lead to insufficient lubrication of the rubbing pairs.
There are several oil options that are suitable for your vehicle. An official dealer product is often labeled as Nissan Genuine Hypoid Gear Oil. However, the market offers many high-quality analogues from the world's leading manufacturers, which are not inferior to the original in quality and often surpass it in terms of price and performance.
- 🔧 Original oil Nissan (catalog number KLM16-00000) - guaranteed compliance with manufacturer's specifications.
- 🔧 Alternative brands Mobil 1 or Liqui Moly with permission API GL-5 and viscosity 75W-90.
- 🔧 Budget options that strictly comply with the standard API GL-5, but with a proven reputation as a manufacturer.
Chemical incompatibility of additives can lead to sedimentation, which will clog drainage channels and cause oil starvation.
⚠️ Attention: Never use oils approved API GL-4 in the rear gearbox Nissan Murano Z51. The absence of the necessary extreme pressure additives will lead to rapid destruction of gear teeth and failure of the differential.
Replacement frequency and condition diagnosis
Recommended gearbox oil change interval Nissan Murano Z51 is every 45,000 - 60,000 kilometers. However, this figure is an average and may vary depending on driving style and operating conditions. If you often drive off-road, tow a trailer, or operate your vehicle in hot climates, the interval should be reduced to 30,000–40,000 km.
Diagnostics of the oil condition does not require complex equipment and can be carried out by the owner independently at each engine oil change. It is necessary to visually assess the color and consistency of the liquid, and also check for the presence of foreign impurities. Pure oil should have a clear amber or slightly reddish tint.
Signs of oil wear appear in changes in its physical properties. If you notice metal shavings on your drain plug or an oil stain on your garage floor after a drive, this is a sign that you need immediate attention. Metal dust indicates the beginning of the gear destruction process, and delay may cost you a complete replacement of the unit.
- 🛑 Black oil indicates severe oxidation and overheating of the unit.
- 🛑 The presence of metal shavings or shine requires urgent diagnosis of the gearbox.
- 🛑 Water in oil (emulsion) may appear after overcoming deep water barriers.
In some cases, when using premium synthetic oils, the manufacturer allows an increase in the interval, but experienced mechanics do not recommend taking risks, since the cost of replacement is not commensurate with the cost of repairing the gearbox.
- up to 50,000 km
- 50,000 - 100,000 km
- 100,000 - 150,000 km
- more than 150,000 km
Preparation for the procedure and necessary tools
Before you start changing the oil, you need to prepare the workplace and ensure the safety of the work. The car must be placed on a flat surface, preferably on a lift or inspection pit. If this is not possible, use reliable wheel stands and a jack, but be aware of the risks.
To do the job you will need a set of specialized tools. A regular key socket may not be suitable for unscrewing the filler plug if it is very stuck or has a non-standard shape. It is also necessary to provide a container for draining waste liquid with a volume of at least 1.5 liters.
Be sure to check the condition of the drain and fill plugs before starting work. If the threads are stripped or the gasket is damaged, they must be replaced before starting the procedure. The use of sealant instead of a gasket in the gearbox is not recommended, as this may lead to blockage of the oil lines.
☑️ Preparing for an oil change
Don't forget to prepare gloves and rags, as gear oil doesn't wash off well and leaves greasy stains on clothes. It is also important that the temperature of the engine and gearbox is moderate - the oil should be warm for better drainage, but not hot to avoid burns.
⚠️ Attention: Before unscrewing the filler plug, make sure it opens! If you drain the old oil and the filler plug becomes sour or breaks, you will be left without the ability to add new fluid and will have to call a tow truck.
Step-by-step instructions for changing the oil
The process of changing the oil in the gearbox Nissan Murano Z51 Starts by cleaning the area around the drain and fill plugs. Use a wire brush and solvent to remove any dirt or sand that may get inside the unit when you remove the plugs. This is a critical step, as abrasive particles will immediately ruin the new oil.
Open the filler plug. This should be done first to ensure that you can add oil later. After this, place a container under the drain plug and carefully unscrew it. The used oil will begin to flow out under pressure, so keep the container close to the hole. Allow the oil to drain completely until the flow becomes dripping.
Clean the magnet on the drain plug of any metal shavings. If there are a lot of chips, this is a cause for concern and more detailed diagnostics. Place the plug in place, tighten it to the recommended tightening torque, but do not overtighten, so as not to strip the threads in the gear housing.
Now we move on to filling in new oil. Use a special funnel with a flexible hose or a manual oil pump. Fill the liquid until it begins to flow out of the filler hole. This is the correct oil level in the gearbox.
- ✅ Use a filling pump if access to the hole is difficult.
- ✅ Control the level visually - the oil should be on the edge of the hole.
- ✅ Tighten the filler plug while the oil is still flowing slightly to ensure a tight seal.
After completing the procedure, tighten all the plugs completely and wipe the gear housing from smudges. Start the engine, put the car in gear and run the car for a few minutes to distribute the oil throughout the system.
If you don't have a fill pump, you can use an empty plastic bottle with a pierced cap and a long hose to gently squeeze the oil into the hole.
Filling volumes and control values
Exact volume of oil required to fill the rear gearbox Nissan Murano Z51, is 0.85 liters. However, for a complete replacement and compensation for losses during draining, it is recommended to purchase 1 liter of oil. You should not skimp and add less, as a low fluid level will lead to overheating and damage to the bearings.
It is important to note that the volume may vary slightly depending on the vehicle configuration and the type of differential installed. Always refer to the actual level reached at the edges of the filler hole, not just the instructions.
| Parameter | Meaning | Note |
|---|---|---|
| Oil type | API GL-5 | Mandatory Specification |
| Viscosity | 75W-85 / 75W-90 | Depends on climate |
| Refill volume | 0.85 l | Recommended volume |
| Drain plug tightening torque | 40-50 Nm | Use a torque wrench |
| Filler plug tightening torque | 25-30 Nm | Be careful with the aluminum housing |
Do not use oil with a viscosity of 80W-90 or higher for winter use, as this may make it difficult to pump the fluid in cold weather and lead to increased wear at start-up.
The correct oil level in the gearbox is determined by the edge of the filler hole, and not by dipsticks, since the gearbox does not have them.
Frequent errors and operating nuances
One of the most common mistakes owners make is using transfer case transmission fluid in the rear gearbox or vice versa. Although some Nissan models use similar fluids, Murano Z51 There are specific requirements for viscosity and additive package that must not be violated.
Another mistake is ignoring traffic jams. The drain plug often has a magnet that collects metal shavings. If you don't clean the magnet every time you replace it, dirt can get back into the system. It is also important to check the condition of the O-ring, which loses its elasticity over time.
Don't forget about the all-wheel drive system. After changing the oil in the gearbox, it is recommended to take a short trip with 4WD mode turned on to make sure there are no extraneous noises or vibrations. This will allow you to check the operation of the coupling and the uniform distribution of torque.
⚠️ Attention: If after changing the oil you hear a howling or humming noise that gets worse when accelerating, stop immediately and check the oil level. Perhaps there was a defect during refueling or dirt got into the gearbox.
It is also not recommended to mix mineral and synthetic oils. If you are switching from one type to another, it is better to flush the system completely or change the oil twice at short intervals to force out the old fluid.
What to do if the plug does not unscrew?
If the plug is stuck, do not use excessive force to avoid stripping the thread. Use a penetrating lubricant (WD-40), let it sit for 10-15 minutes, and then carefully try to unscrew it by gently wiggling the wrench.
FAQ: Answers to frequently asked questions from owners
Can I use 80W-90 oil in Nissan Murano Z51?
Technically possible, but it is not recommended for winter use. Viscosity 75W-85 or 75W-90 is optimal for better pumpability at low temperatures and protection under high loads. Using thicker oil may result in increased friction during cold starts.
How often do you need to change the oil in the rear gearbox?
The official regulations recommend replacement every 60,000 km, but experts advise reducing this interval to 40,000–45,000 km, especially when operating in difficult conditions (city traffic, off-road, towing). Regular replacement extends the life of the gearbox and all-wheel drive system.
Do I need to warm up the oil before draining?
Yes, warm oil drains better and takes with it more wear products. It is recommended to drive 5-10 kilometers before starting the replacement procedure. However, do not overheat the unit to avoid burns when handling hot oil.
What happens if you pour oil into the gearbox?
Overfilling the oil can lead to its squeezing out through the seals and ventilation, which will cause oil starvation and overheating. Excessive pressure inside the gearbox can damage seals and cause leaks. The level should always be exactly at the edge of the filler hole.
Is it possible to change the oil without a lift?
Yes, you can use sturdy stands and a jack, but this requires special care. Make sure the vehicle is securely secured so you can work underneath it safely. Don't rely on a hydraulic jack alone without a safety net.