The Nissan X Trail variator is a structurally complex unit consisting of many parts and mechanisms. Unlike classic slot machine, CVT transmissions are more sensitive to operational errors. In this article, you can learn about faults, cons, as well as rules to be aware of when using a gearbox.

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Device and principle of operation

To begin with, we will analyze the device and the principle of operation of the CVT gearbox. If you do not know what a CVT gearbox looks like and how to distinguish it from an automatic transmission, then the second type of transmission is put only on SUVs equipped with diesel engines. In addition, the CVT type of gearboxes is equipped with additional handles for shifting and downshifting. There are no other visual differences.

On the nissan cars X Trail 2007, 2008, 2010, 2011 and other years of production, two types of variable speed transmissions are installed. This may be the RE0F06A or RE0F10A model, which the developers began to put on newer cars. The second option is distinguished by equipping lighter pulleys and using a single-piston shaft.

During production, the designers increased the pressure level in the drive pulley circuit to 60 kg/cm. The external frequency of processing has also been improved, which helps to prevent the adhesion of the working lubricant. In CVTs Nissan X Trail 141, 144, 169 hp With. a wider range of gear ratios is used, while the developers have completely modernized the hydraulic control system.

Find out about the features of the operation of CVT gearboxes in X-Trail SUVs from the video shot by the NenaRockOff channel.

In terms of their design, as a whole, the X-Trail CVT gearboxes in the back of T31 and T32 2012, 2014, 2015 and other years of production can be compared in a simplified way with the design of a bicycle chain drive. The CVT uses a metal belt that runs over the surface of two shafts. To change the value gear ratio, the diameter of these elements changes. The input shaft of the transmission is connected by a clutch connected in position D. The input pulley acts on the secondary, pushing it with the help of a strap, which structurally consists of many steel segments.

According to the vehicle control mode, the surfaces between the pulleys change under the influence of the control module. Thanks to him correct work the belt can rotate input shaft slower if reduced speed is simulated, or faster if increased. By changing the position of the shaft, the control module can achieve any ratio.

Life time

Now let's take a look at the average service life of a new CVT gearbox in a 2016, 2019 car with an engine capacity of 2 liters. The official manual states that the CVTs of these cars, on average, serve at least 100 thousand km before the first scheduled repairs. Such a resource is available correct operation gearboxes and timely replacement transmission fluid which the manufacturer recommends doing every 6 months.

If maintenance is done on time, then reliable variator X Trail will last much longer. It is only necessary to periodically check its performance and at least once a year to diagnose the condition of the circuit.

Common Problems and Troubleshooting

Failed variator cone

Before you check and repair the variator, familiarize yourself with the signs of its breakdown:

• when driving on a flat surface, the car slips;
• on the control panel of the car in the cabin there was an indicator of activation of the emergency operation mode;
• the vehicle slows down the engine speed, while a rumble comes from the transmission;
• there were problems when shifting gears, the lever does not switch at all or switches, but with difficulty;
• the power of the car decreases, the driver presses the gas pedal, and the car’s engine does not gain momentum, but only buzzes louder;
• vibration appeared in the area of ​​\u200b\u200bthe gearbox selector, it may be present constantly or periodically;
• jerks appear when the driver switches the gear selector to another position.

Improper operation and maintenance leads to problems in the operation of machines and the need for repairs. In their reviews, X Trail owners often share that after replacing transmission oil the gearbox hums, and the car twitches or does not go at all. Let's analyze the malfunctions typical for the checkpoint of Japanese SUVs.

Noise

One of the most common problems with CVT gearboxes X Trail t31 or in another body is the breakdown of bearing parts. When the service life of the devices comes to an end, noise begins to be heard from the transmission. In practice, this usually happens after 50 thousand kilometers. Bearing failure is usually associated with the design features of CVT boxes.

As a result of rapid wear, if the driver fails to use the CVT correctly, wear products clog the oil channels of the unit. Two filter devices with magnets will not be able to attract all the metal dust. The chips eventually settle in the transmission channels and clog them, which leads to the need to replace bearing parts.

If you reduce the transmission fluid change interval to 30 thousand kilometers, as some motorists advise, this will not solve the problem and will not help increase the life of the bearings.

CVT bearing Nissan

Loss of power

Car owners usually face the problem of power loss when they do not change the transmission fluid in a timely manner. Most likely, the reason lies in the clogging oil channels, which leads to the need to perform not only the change consumable, but also washing the unit. It is necessary to check the operation of the gearbox after you make sure that the engine and the main components that affect the power drop are in good working order. This is about fuel filter and various sensors. When changing the oil in the gearbox, it is necessary to remove as much as possible all wear and contamination products from the gearbox, otherwise the car will continue to lose “traction” in the future.

Jerky riding

The presence of noticeable jerks while driving may indicate the use of low-quality gear oil or its lack in the unit.

If the level is normal and the fluid quality is good or satisfactory, we recommend diagnosing the hydraulic valve. If it breaks down, the car will twitch 1-2 times per kilometer traveled with cruise control on. It is better to entrust the check to specialists who have the necessary equipment.

Variator replacement

If desired, the car owner can replace the CVT transmission with mechanics. Manual transmissions by virtue of their specifications and design features more reliable than CVT. But the replacement of the box must be carried out only at a specialized service from qualified craftsmen. When changing the unit, you will need to reflash and adapt the control module to work with mechanics. Otherwise, the control unit will constantly generate an error, and the CVT transmission itself will become unstable. Jerks, shocks and vibrations will appear. If the replacement is performed incorrectly, then the engine will not start.

Learn more about CVT repair from the video filmed by the DDK Motor channel.

User manual

Below we will analyze the instructions that will allow you to properly use and drive a car with a CVT gearbox.

Keep in mind the following precautions:

1. When power unit operates on Idling, it is necessary to switch gearshift modes smoothly. When switching, the metal belt of the gearbox is automatically transferred to the required gear. If the transition is too sharp, the belt wears out faster. This leads to a rapid development of the transmission resource and a decrease in its service life.
2. Do not start moving from a place by pressing the gas pedal to the stop. This exposes the gearbox design high loads which may result in damage to parts.
3. To prevent malfunctions, it is best to avoid constant driving at high speeds.
4. Do not tow other vehicles or trailers.
5. Do not turn on or off reverse gear until the car comes to a complete stop.
6. Eliminate wheel spin. Often cars skid when they get stuck in mud or snowdrifts. You should not try to roll out of an obstacle, alternately turning on R and D modes. It is better to turn on neutral gear and ask someone to pull the car out of the obstacle.

Starting the engine in winter

It is necessary to operate CVT in the cold season with special care. At low negative temperatures, the vehicle engine warms up at idle, but it will not be possible to effectively heat the transmission in this way. The gearbox warms up optimally while driving. But you should not drive immediately after starting the engine at high speeds. Having started the engine, the driver needs to press the brake pedal, and then switch the gearbox selector to position R or D. This will allow the unit to warm up faster, but the first 10-15 minutes after engine start We recommend moving slowly.

In heat or under load

When operating the car in the hot season, the driver must regularly check the oil level and its condition in the gearbox. When working in conditions high temperatures the lubricant loses its properties faster. A special radiator device is used to cool the unit. The car owner must periodically diagnose it and make sure that the unit is working clean. Otherwise, the unit may overheat, which will lead to its breakdown.

Find out how to prevent problems in the operation of a CVT transmission from the video filmed by the AnTiNooB Stream / Live channel.

Service

Briefly about the nuances that must be taken into account when servicing the X-Trail model with CVT.

Diagnostics

To identify malfunctions in the operation of a CVT transmission, it is advisable to use computer diagnostics using a laptop and special software. The error codes obtained as a result of the check must be decrypted and the breakdown determined.

It is necessary to make a more detailed diagnosis of the CVT transmission if the oil in it is too dark or there is a smell of burning from it. As a result of the repair, the unit will also need to be flushed. If the diagnostics showed the presence of wear products in the gearbox, then the radiator device will need to be replaced and its lines flushed.

The channel "Service, repair, diagnostics Nissan" in its video showed the process of diagnosing and repairing a CVT transmission in the X Trail.

Oil and filter change

What nuances should be considered when changing the lubricant:

1. If you are following the transmission oil change procedure in garage conditions, then for the bay use only original product CVTF+4. According to the manufacturer, the use of other lubricants can lead to malfunctions in the transmission. Experts recommend replacing the filter device when changing the lubricant.
2. Be careful not to overfill when pouring liquid. If the lubrication level is higher than normal, this will lead to an increase in pressure in the gearbox. As a result, the car owner will face the problem of squeezing out the plug and hole, which will cause leakage of consumables. With such a problem, squeaks may occur in the operation of the transmission, however, due to the good sound insulation of the vehicle interior, the driver will not hear them.
3. Always keep an eye on the level of lubrication in the system. If the gearbox operates without lubricant due to a leak, it will fail in half an hour when running dry. Restoring the unit will be impossible.

The automatic transmission channel Technology Repair in his video showed how you can independently restore the performance of the CVT transmission in the Nissan X Trail.

Advantages and disadvantages

Let's analyze all the pros and cons characteristic of X-Trail CVT transmissions.

Advantages:

1. This car model uses a gearbox that is simpler in design than its predecessors. The RE0F10A variator model is characterized by a simplified device, which allows car owners to independently carry out diagnostics and maintenance of the unit.
2. The designers made simplified access to the gearbox. When changing the oil, the car owner will be able to independently dismantle the filter device coarse cleaning and flush it.
3. CVT Nissans are equipped with magnets installed in the pan, the presence of which allows you to attract wear products in the form of metal chips.
4. In new Nissan X Trail models, it is not necessary to warm up the liquid when starting the engine. Structurally, the gearbox includes an additional lubricant heater, which is automatically activated when the power unit is started.
5. Due to the use of a single-piston shaft in CVT transmissions RE0F10A, the weight of the pulleys is significantly reduced, which reduces their wear.
6. The presence of an air radiator in the design. This reduces adhesion, foaming of the transmission fluid, and also reduces the temperature of the CVT to prevent it from overheating.
7. Device reliability.
8. There are many reviews about fuel consumption. When compared with manual transmission, then cars with CVTs consume more fuel. But if you compare it with a traditional automatic, then cars with CVTs “eat” less fuel. This is due to the lack of steps in the CVT.
9. A car with a CVT accelerates smoothly. Moreover, the acceleration itself on such cars occurs more quickly due to the lack of gears.
10. Ease of controls.
11. CVT belongs to the category of the most environmentally friendly transmissions. Compared to traditional machines and mechanical boxes transmissions of machines with CVTs emit less harmful substances into the atmosphere.

• sensitivity to misuse;
• high cost of repair and maintenance;
• failure of one of the sensors in the design of the CVT transmission will lead to the inoperability of the unit as a whole.

Variator cost

The average price of the Nissan X Trail RE0F10A variator today is about 80 thousand rubles. A used transmission can be purchased cheaper.

Automatic transmission provides gear shifting without driver intervention, depending on the speed of the car, on the frequency of rotation crankshaft and from the load. The driver only needs to select the automatic transmission mode by moving the automatic transmission mode selector to the appropriate position. At the same time, on a car with a QR25DE engine, it is possible to control gear shifting manually.

Automatic transmission

Two types of automatic transmissions are installed on Nissan X-Trail cars. On vehicles with gasoline engines use a continuously variable automatic transmission - V-belt variator (CVT).

car with diesel engine can only be equipped with a hydromechanical automatic transmission (AKP). The variator is not used in conjunction with a diesel engine.

The selector lever is connected to the gearbox by a cable in a protective sheath.

The electronic unit controls all mechanisms of the automatic transmission. At the same time, it monitors the condition of all its electrical components. In the event of a malfunction, the instrument panel will illuminate control lamp AT CHECK. The codes of the detected faults are stored in the memory of the electronic control unit. To read fault codes, an external diagnostic device - a scanner - must be connected to the diagnostic connector.

The design of the automatic transmission of the "classic" design includes a torque converter, an oil pump, planetary gears, friction clutches and brakes. The torque converter acts as a clutch. During operation, it is filled with a working fluid and, rotating at a sufficient speed, transmits torque from the transmission engine, absorbs and smoothes vibrations and jerks from the operation of the engine and gearbox. The torque converter consists of three wheels: pumping, reactor and turbine, this also includes its blocking clutch. The impeller is integrated with the torque converter housing and fixed to the engine flywheel. turbine wheel spline connection associated with input shaft gearboxes. Upon reaching a certain speed with the help of a clutch, the torque converter is blocked, while providing a rigid connection between crankshaft engine and transmission. This significantly reduces power losses and has a positive effect on driving dynamics and fuel consumption.

The planetary mechanisms are installed directly in the automatic transmission case and are designed to provide a change in gear ratio and reverse gear engagement. The planetary mechanism (transmission) consists of four main elements: the sun gear, the carrier with satellites and the ring gear. Changing the gear ratio and direction of rotation occurs due to blocking or

unlocking two of the three elements (sun gear, carrier, ring gear) in various combinations.

Friction clutches and brakes are designed to block various elements of planetary mechanisms. They work with pressure. working fluid when the corresponding valve is opened. Valves open in sequence electronic unit control depending on the speed and position of the gas pedal, on the frequency of rotation of the crankshaft, etc.

Since the working fluid heats up during the operation of an automatic transmission, a heat exchanger is installed on the gearbox to cool it.

Warning!_

Automatic transmission - reliable unit a car with a long service life, but subject to regular maintenance. The reasons for the reduction of service life and its failure may be:

Ingress of grains of sand or other foreign particles into the internal cavities of the automatic transmission;

Operation with a disturbed level of the working fluid (both low and high);

Use of non-recommended working fluid.
The continuously variable automatic transmission does not have a set of gears to change gear ratios, and is a V-belt variator (CVT). Instead of gears in it on the primary and secondary shaft pulleys installed. Each pulley consists of a pair of movable cones. A special mechanism allows you to move the cones on the shaft, bringing them closer or further away. In this case, the diameter of the pulley changes, as it were. The design of the movable cone drive is such that when the diameter of one pulley decreases, the diameter of the second one increases by the same amount, and vice versa.

Torque is transmitted from one pulley to another by a special V-belt assembled from metal plates. Because the pulley diameters change synchronously, the belt tension does not change.

Since the range of gear ratios in such a transmission turns out to be symmetrical about the average value (that is, relative to the gear ratio, equal to one), an additional reduction gear has been added to the box to shift the range of gear ratios of the variator towards large numbers. The gear ratio of the downshift is selected so that the transmission is as adapted as possible to technical parameters engine (that is, the final values ​​of the gear ratios are close to the hydromechanical automatic transmission).

The drive of the cones is hydraulic, and instead of the clutch, a torque converter is used, as in the automatic transmission. For work hydraulic system the box has a chain-driven pump.

Despite the fact that a variator of a similar design was invented and patented back in the century before last, it began to be used on cars relatively recently. Mainly the introduction of innovation was hampered by the lack of a strong belt capable of transmitting high torque and at the same time flexible and wear-resistant. When the belt slipped on the pulleys, intensive wear of all working surfaces of the drive occurred. Moreover, as the parts wear out, the destructive process increases. Therefore, for a long time, the box design was used only on two-wheeled vehicles and on low-power cars. Application modern technologies and materials made it possible to turn the variator into a reliable unit. However, the variator does not like alternating loads. Therefore, having stalled off-road in a car with a variator, getting out on your own “into the buildup” is not the most suitable way.

During the operation of the car at least at each replacement engine oil in the engine, it is necessary to make sure that there is no leakage of working fluid from the gearbox. If a leak is found, the problem must be repaired. the shortest time. Change the working fluid in accordance with the maintenance plan.

An automatic transmission is a technically complex unit, which should be serviced and repaired only at a specialized service station.

Examination technical condition automatic transmission

To perform the work, an inspection ditch or overpass is required.

We perform the work in the following order:

1. We prepare the car for maintenance and repair, we install the car on a viewing ditch or overpass.

2. Check the level and condition of the working fluid (see below). We inspect the gearbox from all sides, make sure that there are no leaks of the working fluid:

a) the presence of leakage of the working fluid in the lower part of the junction 1 of the gearbox housing and the engine cylinder block indicates the need to replace the torque converter seal.

Comment

It should be borne in mind that the same drips will cause wear on the crankshaft rear oil seal.

A low (or high) level of the working fluid can have a significant impact on the operation of the gearbox, and even cause it to fail. Therefore, if leakage is detected in the gearbox, the malfunction should be eliminated as soon as possible, and if necessary, continue to operate the car, the level of the working fluid in the gearbox should be checked regularly.

B) the presence of streaks of the working fluid along the perimeter of the pan 2 indicates the need to replace the gasket;

C) the presence of leaks of the working fluid at the junction of the gearbox with the front wheel drives 3 indicates the need to replace the drive seals.

3. We are convinced of the serviceability and correct adjustment selector cable, as well as in good condition of the selector of operating modes of the automatic transmission. The selector must be clearly fixed in all positions, while its positions must correspond to the included modes. In addition, all blocking of the selector from its accidental movement should work properly. If a malfunction is found, it must be corrected.

4. We start the engine. We switch the selector lever in turn to all positions, making sure that the gearbox control drive is working. Set the selector lever to position N ("neutral"). We release the brake pedal, while the car should not start moving.

Comment
Small jolts that occur when switching modes are not a malfunction. Difficulties when switching modes of operation of the gearbox can be caused by improper adjustment selector drive, large play in the drive, selector malfunction. If necessary, adjust the drive, replace the faulty drive cable. If the gearshift drive is OK, the transmission itself is probably faulty and needs to be repaired.

5. We check the operation of the gearbox in motion. To do this, on a car with an M9R diesel engine, we first accelerate and then decelerate with mode D on. We make sure that the gear shifts smoothly (both up and down), in the absence of crunching, knocking and other extraneous sounds when operating the box, and spontaneous shutdown gears when the load changes. When driving, there should be no jerks, bumps and various extraneous sounds. We check the correctness and timeliness of gear shifting when driving in various modes. The box should work in all modes without failure. We repeat the test by moving the selector lever to position M and shifting gears to manual mode.

Comment_

Jerks when shifting gears while the car is moving, engaging gears with a blow, delays in gear shifting, the smell of burning from the working fluid, increased noise during operation of the gearbox may indicate wear on bearings or clutch gears and other gearbox malfunctions. Elimination of such malfunctions is associated with the need to remove and disassemble the gearbox. Therefore, such work should be carried out at a specialized service station.

On vehicles with petrol engines

We move first with acceleration, and then with deceleration with mode D on. When driving, there should be no jerks and various extraneous sounds. Acceleration should be smooth, without dips. The box should work in all gears without failures.

On a car with a QR25DE engine, we repeat the test by moving the selector lever to position M and shifting gears in manual mode. The box should work flawlessly.

On a car with an MR20DE engine, we repeat the test by turning on the SPORT mode by pressing the corresponding button on the automatic transmission mode selector lever. The box should work flawlessly.

Comment

Failures during acceleration of the car, the smell of burning from the working fluid, increased noise during the operation of the gearbox may indicate wear on the bearings or clutch gears and other transmission malfunctions. Elimination of such malfunctions is associated with the need to remove and disassemble the gearbox. Therefore, such work should be carried out at a specialized service station.

6. Turn on the transmission reversing, by moving the selector lever to position R, and make sure that this mode is working.

7. If a malfunction is detected, we repair the gearbox at a specialized service station or replace it as an assembly.

Checking the fluid level

Checking the fluid level in the automatic transmission should be carried out in accordance with the maintenance plan.

To check the level of the working fluid in the gearbox housing, a pointer is made, similar to how it is done in the engine. But at the same time, the procedure for checking the level in the automatic transmission has several specific features. Checking the level of the working fluid is carried out on a flat area with the engine running and the selector position in P or N mode. The temperature of the working fluid should be about 50-80 * C. To do this, at an ambient temperature of 20 * C, it is necessary to drive a car for at least 10 minutes in intensive mode, simulating traffic in a city stream. Additionally, before removing the level indicator, you must smoothly move the selector from P to all positions and vice versa.

We check the level of the working fluid in the following order.

1. After warming up the working fluid in the automatic transmission, we prepare the car for maintenance and repair by installing it on a flat area.

2. Sequentially move the selector lever through all ranges and leave it in position P or N.

3. We release the lock on the handle of the working fluid level indicator and remove the indicator from the guide tube.

4. Visually and by smell we determine the condition of the working fluid. Then we wipe the pointer chi-

stand with a lint-free rag or special paper.

Comment
When checking the level, pay attention to the condition of the working fluid. A sticky film buildup on the gauge may be caused by fluid deterioration due to overheating. This fluid must be replaced. Darkening of the liquid, the appearance of the smell of burnt oil can warn of a malfunction in the gearbox. Metal particles indicate wear of rubbing parts. In all cases, it is necessary to contact a specialized service station as soon as possible.

5. We install the pointer all the way into the guide tube so that the protrusion on its handle is located with opposite side from the clamp on the tube.

6. Re-extract the pointer and determine the level of the working fluid, which should be between the marks.

Recommendation
If necessary, bring the fluid level to normal through the level indicator tube. Add liquid in small portions of 50-100 ml, checking the level after each filling. Use only fluid recommended by the manufacturer.

7. At the end of the check, install the pointer in the gearbox so that it is securely held by the latch.

Changing the working fluid

We carry out the work in accordance with the maintenance plan. The need to replace the working fluid in an automatic transmission may be required if its properties deteriorate (see above) on vehicles with high mileage.

To perform the work, you will need an inspection ditch or overpass, a wide container with a capacity of at least 8 liters, for waste fluid, a new sealing gasket for the plug drain hole, measuring container.

We perform the work in the following order.

1. We prepare the car for maintenance and repair, install it on a viewing ditch or overpass.

2. Remove the engine crankcase protection (if the protection is installed).

3. We install a container under the drain hole in the gearbox housing pan.

4. With a 19 mm wrench, loosen the drain plug, unscrew the plug and drain the waste fluid into a container.
5. When the liquid stops flowing out, we wrap the plug into the hole with a new gasket and determine the amount of drained liquid.

6. Pour the same amount of new working fluid into the gearbox through the level indicator guide tube.

7. We check the level of the working fluid, if necessary, bring it to normal (see above).

PRICES

EXAMPLES OF RECENT WORK

HOW REPAIRS GO AT AKPP-SERVICES

When disassembling the CVT, the valve body is removed first. In 90% of cases, a full pallet of chips + hedgehog magnets is found. It can be visually seen that the cone is seized, 100% due to the fact that the oil pump is jammed pressure reducing valve.

The front part of the variator is removed - the bell. We see the clutch forward and reverse clutches. The forward clutch clutches have obvious slip marks (burnt friction material). Further disassembly confirms our conclusions that the cones are damaged (teared) and the belt has obvious signs of wear.

We take out the assembly of cones with a belt from the box, carefully remove the belt. When the belt is scrolled, the tapes on which it is assembled make clicks, which indicates their stretching.

We remove the oil pump, with difficulty we get the pressure reducing valve, which is stuck in an intermediate position, which is typical malfunction these variators.
We disassemble the leading cone and see that the metal guide balls have obvious signs of wear and destruction. In this case, you have to change the cone, since the channels in which they work have appeared shells. If there are no problems with this, then we limit ourselves to grinding the working surface. We inspect the cone bearings, even if they do not have obvious traces of wear on the treadmills - they still change, since it is impossible to predict when they will fail.

Repair steps:
- all parts are washed (including cases) and prepared for installation.
- Change the aluminum fork of the follower (chain follower) if it has wear on the working shelf
- Replacement drive chain oil pump if it is stretched
– hull repair (if necessary)
- replacement of CounterShaft MainShaft drive gears (if necessary)
- replacement of the central hub Stator (in case of destruction of the bearing of the central hub)
- replacement of the input shaft Input shaft (if necessary)
— replacement of the back cover End cover (if necessary)
- first of all, the gasket repair kit is changed
- leading cone (Primary Pulley) - changes if it is impossible to restore the native one (has critical wear on the working surface).
- oil pump - restoration to performance (the resource from the new one is 80%) or replacement with a new oil pump
- Put in a set of new bearings
- put new belt(belt)
— put a set of new clutches and steel discs
- the assembly of the variator takes place in the reverse order
– torque converter repair (own Translock workshop – we don’t take it anywhere else!)

The last and one of the most important stages is the repair of the hydraulic control unit. It implies the restoration of the holes for the plunger (valve) worn out from the ingress of chips and metal dust. The tightness of the valves in the valve body is checked on a vacuum stand. Solenoid valves pressure regulators A and B (solenoids) are ultrasonic cleaned and, if necessary, they are replaced, or the set of solenoids is changed immediately. The performance of a stepper motor (step motor) is checked in each case individually, because when errors appear on the stepmotor, this does not necessarily indicate its malfunction. After repair, the valve body is installed on the variator.
put new filters, pallet.

GENERAL PROVISIONS

When overhaul the gearbox is dismantled from the car. At this stage, the mechanic carefully inspects the condition of all systems serving the gearbox, mounting supports power unit etc.

After dismantling from the car, the automatic transmission enters the overhaul site. It should be noted that in this section, as well as in all the previous ones, experienced craftsmen who have a higher technical education (engineering and physics) work. Here, the Nissan X-Trail variator is being repaired, and after washing and drying all the parts, their fault detection is carried out, i.e. the possibility of further use of each part or the need to replace it is determined.

If desired, any customer can be present both during the disassembly of the gearbox and during the inspection of its parts. At the end of this procedure, a list of replaceable parts is compiled, which is then without fail agreed with the customer. It should be especially noted that during the overhaul, it is necessary, regardless of the condition of the automatic transmission, to replace all seals and gaskets. The use of original spare parts only from manufacturers of gearboxes increases the service life of a repaired automatic transmission Nissan X-Trail, but leads to a significant increase in the cost of spare parts. To achieve the most optimal combination of “price-quality” ratio allows the use of “aftermarket” parts, i.e. companies specializing in the production of spare parts for automatic boxes gears.

The installation is made taking into account all technical requirements. At this stage, the failed fastening elements are replaced and auxiliary systems gearbox service. In addition, during installation, preliminary adjustments are made to the elements of the external part of the control system.

Output diagnostics and running-in of the car. They are carried out according to the same methods as the input diagnostics. In addition, all previously appeared fault codes are erased from the memory of the control unit.

More than ten years have passed since CVT transmissions ( further - CVT) began to be installed on cars Japanese made Nissan. But time does not stand still and progress, too. More and more motorists prefer vehicles with CVT. If you decide to purchase the X Trail, it is better to read the reviews of the owners on the net right away - you will learn a lot of new things.

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Type of variator and resource of its work

On the SUV Nissan X-Trail can be installed in one of two types: RE0F06A or RE0F10A (JF011E). The latter are installed on the Nissan X-Trail and Qashqai J10. What is the difference between these types of CVTs? First of all, it's a big technological process during the production of the mechanical part.

SUV Nissan X-Trail

An improved version of the CVT (RE0F10A) differs from its predecessor in that the CVT pulleys are lighter, and the drive pulley has become a single piston. The company's engineers increased the pressure in the drive pulley circuit to 60 kg/cm. Note the improved external frequency of processing, which reduces the likelihood of transmission fluid adhesion and foaming.

The range of gear ratios was expanded in the system, the hydraulic control system was completely redone. To reduce losses, the pressure is adjusted on the driving and driven pulleys independently of each other. Prior to this, pressure adjustment took place on both pulleys. In the structure of the unit appeared chain drive as a result of the transfer of the oil pump to the sump.

User manual

As a result of the increased pressure, the temperature of the transmission fluid also increased. Therefore, the automaker's employees equipped the CVT system with an air cooling radiator. At the same time, the engineers added an oil heater. For what? When the driver starts the engine, the temperature, of course, does not match the operating temperature and the loads are also too high.

In such cases, the car owner believes that the transmission can be warmed up by pressing the gas pedal, but in this case the steel chain will rub against the cones and scratch them. And this will lead to a break in the circuit, but before that, metal dust from it will clog the system.

X-Trail car interior

The problem is not that the employees of the manufacturing enterprise, having nothing to do, decided to add more “hemorrhoids” to the car. It's just that domestic motorists mostly ignore the operating instructions from the manufacturer. It is enough to warm up the car to a safe temperature before driving (20 degrees Celsius) to prevent the elements from rubbing against each other. Accordingly, the likelihood of metal chips in the variator will decrease.

If you start the engine in winter

In the cold season, the engine warms up to idling(on the neutral speed). If on the street subzero temperature, then the box will not warm up in neutral, as a result, it will have to be warmed up while driving. Of course, at a cold checkpoint it will not be possible to immediately go in the usual mode. There is a trick for this, which you could read about in the operating instructions for the vehicle.

Extract from the instructions: to warm up the CVT automatic transmission, start the engine, and with the brake pedal depressed, switch the speed to “D” or “R” mode. You need to hold the gas pedal and let the car run - this will warm up both the engine and the gearbox.

In the Nissan X-Trail, it is important not to run an oil change. The service life of the transmission fluid should not exceed 60 thousand km, but if you do not follow the operating rules, then it is better to change the ATF every 50 thousand km. Note that after changing the fluid using a scanner, you need to reset the oil aging counter. Otherwise, the pressure in the system will be non-standard and the resource of the variator will be reduced. To check how much transmission fluid is in the box, you need to use the dipstick.

CVT from Nissan X Trail on a pallet

Common breakdowns and methods for their elimination

Here is a list of symptoms that indicate abnormal CVT operation:

• the car starts to slip on a flat road (without dirt and snow);
• on the instrument panel of the X-Trail, the lamp for switching on the emergency mode of the gearbox was lit;
• the car slows down, while noise is heard from the box;
• speed does not switch or switches with difficulty;
• the power of the car disappears (when you press the gas pedal, the engine hums, as if in neutral);
• vibration of the box (systematic or periodic);
• when switching gears, the car starts to twitch, troit.

Noise

A common CVT failure is bearing failure. If they have already worked out their resource, the driver will hear noise or hum from the box. Such a problem occurs no earlier than with a run of 50 thousand km. How much is it? Replacing elements at a service station will cost no less than 35 thousand rubles (about 10 thousand hryvnias).

Disassembled CVT Nissan X-Trail

There are a number of reasons why bearing noise occurs. This may be the ingress of wear products into the variator system. In this case, you should not hope for two oil filters with a magnet that your CVTs are equipped with. Because they won't prevent metal dust from getting into the transmission fluid.

Some "craftsmen" advise to reduce the frequency ATF replacements up to 30 thousand km to avoid destruction and increase the service life of bearings. But, early fluid replacement (after 30 thousand kilometers instead of 50 thousand) does not affect the life of the bearings.

Loss of power

If there is a problem, then you have never changed the oil in the automatic transmission or have done it for a long time. Then you need urgent replacement liquids with a complete flushing of the system. It is important here to get rid of all wear products in the variator, otherwise the car will lose “traction” on the road from time to time. How much chips and dust in the gearbox, you can see the liquid draining from it.

Emergency mode

First, check if there is oil in the car. There may have been a transmission fluid leak, and its absence in the automatic transmission will lead to full exit failure of the unit. Then you have to shell out a tidy sum for the purchase of a new CVT.

X-Trail under the hood

Jerky riding

If jerks are noticed while driving at a constant speed, then this may indicate another problem. In particular, for one kilometer of the road, the car twitches 1-2 times for no reason. These jerks are felt while driving in cruise control. Usually there are problems with the hydraulic valve, which are best solved at a service station with specialized equipment. How much the repair will cost depends solely on the type of damage.

Where to buy and how much?

As for the purchase of new CVT JF011E models, of course, it is better to do it with official dealer Nissan in your city. It's practical, but expensive. But how much does it cost? Not every car owner is ready to shell out 140 thousand rubles (about 35 thousand hryvnia) for the purchase of a new unit.

Naturally, you can buy a Chinese-made transmission at automotive market. It will cost about half as much, but it all depends on the region. Medium market price such units is about 70-90 thousand rubles (about 18-20 thousand hryvnia). Well, their working resource may be less. And maybe more: Chinese production- this is still an unpredictable thing, as lucky as anyone. And keep in mind - buying a CVT from a dealer, you have a guarantee for it, which cannot be said about fakes.

"... In two days, the guys from "AKPP Expert" sorted out the automatic transmission and made repairs..."

I have never dealt with car repairs before. But there was no need for this either - I didn’t drive a car for more than 3 years, I changed it. But this time, something went wrong with my Skoda - I had to call a tow truck. If I tried to turn on the reverse gear - there was a sharp blow. In two days, the guys from "AKPP Expert" sorted out the automatic transmission and repaired the torque converter, which caused the breakdown. Grateful to say!

Nikolay Razbegaev

Skoda Octavia

“The review was taken 4 months after operation. So everything works, and I'm happy!

I have 10 years driving experience. I was not noticed in accidents and aggressive driving, so the breakdown of the automatic transmission was an unexpected event for me. I understand a little about hardware - there was an error of slipping all gears. After delivering the car to service center"AKPP Expert", my assumptions were confirmed. The craftsmen carried out the repair of the torque converter, washed the main cooling radiator, but additionally installed another one - for reliability. Reviewed 4 months after use. So everything works, and I'm happy!

Stanislav Petelin

“A day later, the car was in service, and I was in a good mood.”

I was driving to a meeting and discovered a malfunction - after a short stop when starting the engine, the automatic transmission immediately got into emergency mode. We managed to get to the guys on our own - in fact, the workshop was just nearby. It turned out - well, that it was this one. As it turned out, the problem was in contrast to the specified pressure characteristics. The masters of "Automatic transmission Expert" solved this by cleaning the valve body and replacing the solenoids. A day later, the car was in service, and I was in a good mood.

Ilya Chebyrov

“Adequate price and jewelry workmanship is a plus. I was also pleased with the deadline: after 2 days the car was with me again.”

My car is not new, and I'm not the first owner of it, however before problems I didn’t cause any special: what broke, I repaired myself. This time the problem was more serious - I began to notice that the automatic transmission shifted from in sharp jerks. Turning to the repair service "AKPP Expert" I received a sane consultation and gave the car for repair immediately after the diagnosis. Adequate price and jewelry workmanship is a plus. The term also pleased: after 2 days the car was again with me. Thank you!