Automatic transmission in Nissan Almera is a complex hydraulic mechanism that requires impeccable cleanliness of the working fluid. Contamination of the transmission oil is one of the main reasons for premature failure of the unit, and the key element of protection is the fine filter.
Many owners Nissan Almera They mistakenly believe that changing the oil in an automatic transmission is limited to draining the used oil and filling in a new portion. However, without replacing the filter, the process does not make sense, since a clogged element blocks the access of oil to the valve body and clutches, causing a critical drop in pressure and overheating.
Timely replacement of the filter ensures stable operation of the transmission over hundreds of thousands of kilometers. Ignoring this routine maintenance can result in costly repairs or complete replacement of the unit.
The role of the filter in the operation of an automatic transmission
Main task automatic transmission filter consists of capturing wear products: metal shavings, friction dust and sealing chips. These particles are formed during the natural friction of gearbox parts. If they are not detained, they will begin to circulate through the system, acting as an abrasive.
The filter is installed inside the torque converter sump and blocks the inlet channel through which the fluid flows to the pump. Clean liquid is supplied to the valve body, where it is distributed among the solenoids and actuators. Any flow restriction immediately affects the quality of gear shifting.
It is important to understand that the filter is not designed to clean oil from chemically dissolved decomposition products; it only works with mechanical impurities. Therefore, using a filter element without changing the oil will not be beneficial, since the liquid itself has already lost its lubricating properties.
Original parts and high-quality analogues
When choosing a spare part for Nissan Almera There are two main ways: purchasing an original part or selecting a proven analogue. Original from Nissan (part number 31728-1X000 for many models) is guaranteed to fit the mesh size and density, which is critical for oil pressure.
- 🔹 Original filter - provides maximum compatibility and durability, but costs significantly more.
- 🔹 High-quality analogue - brands like Sakura, Febi or Stellox often offer decent quality at a lower price.
- 🔹 Cheap fakes — are strictly not recommended, since the mesh may not retain small debris or may fall apart over time.
Some owners try to save money by using only a coarse filter, which is a metal mesh at the bottom of the pan. This is a serious mistake, since the thin paper or synthetic element is responsible for retaining microscopic particles that the mesh allows to pass freely.
⚠️ Attention: Installing a non-original filter with a larger mesh can lead to accelerated wear of the valve body solenoids, as small particles will begin to clog narrow channels.
When purchasing, be sure to check the integrity of the packaging and the presence of markings on the product itself. Часто под видом оригинала продаются детали, которые не выдерживают перепадов температур и давлений, характерных для работы Nissan Almera.
Diagnosis of the need for replacement
It is possible to determine that the filter requires replacement by indirect signs of the vehicle's operation. If you notice a jerk when changing gears, especially from first to second or when driving in reverse, this may indicate low oil pressure.
Symptoms of a clogged filter are often accompanied by noise when the automatic transmission pump operates. You may hear a characteristic howl or hum that intensifies when you press the gas pedal. This indicates that the pump is operating in “swinging” mode and cannot provide normal flow.
- 🔸 Jerks and kicks - a sign of insufficient oil pressure due to the resistance of a clogged filter.
- 🔸 Pump noise — a howl or hum is heard when the engine is idling.
- 🔸 Transmission overheating — the temperature sensor shows increased values even in traffic jams.
In some cases, the problem may be hidden, and diagnosis is only possible when the pan is removed. If a visual inspection reveals a lot of metal shavings or “metal dust” at the bottom of the pan, the filter definitely requires immediate replacement.
- Up to 50,000 km
- 50,000 - 100,000 km
- 100,000 - 150,000 km
- More than 150,000 km
Full or partial replacement: what to choose?
There are two main methods for changing the oil and filter: partial (without removing the pan) and complete (with removing the pan). A partial replacement involves draining the old oil through the drain hole and adding new oil. In this case, the filter remains in place and continues to work.
Такой метод подходит только для регулярного обслуживания на небольших пробегах. If you plan to change the filter, partial replacement is impossible in principle, since the filter is located inside the pan. A complete replacement requires dismantling the tray and cleaning it of magnets and dirt.
For Nissan Almera With a mileage of more than 60 thousand kilometers, a complete replacement is strongly recommended. This allows you not only to change the filter, but also to check the condition of the valve body, magnets and o-rings.
⚠️ Attention: When partially replacing the filter, you will not remove wear products accumulated in the pan and on the walls of the torque converter, which reduces the efficiency of fresh fluid.
If you choose a complete replacement, be sure to clean the pan of any remaining old fluid and metal shavings. Use a degreaser and a rag to avoid leaving lint inside the system.
☑️ Preparing to replace the filter
Step-by-step replacement instructions
The process of replacing the filter Nissan Almera requires some preparation and accuracy. The vehicle must be placed on a level surface or on a lift. The engine must be stopped and the transmission cool to avoid burns.
The first step is to unscrew the pallet mounting bolts. Be prepared for some oil to leak out immediately after opening the first bolt. Place a container under the tray to collect waste. Disconnect the electrical connectors of the sensors if they interfere with removal.
After removing the pan, you will see a filter secured with bolts or clips. Carefully disconnect it from the valve body. At this point, some more oil may leak out. Do not forget to clean the seat on the valve body from old sealant or gasket residues.
- 🔹 Cleaning Magnets — at the bottom of the tray there are usually magnets that collect metal shavings. Их нужно тщательно промыть.
- 🔹 Installing a new filter — check that the sealing ring on the filter sits evenly and there are no distortions.
- 🔹 Pan sealing — use a specialized sealant for automatic transmission if a new gasket is not provided or is worn out.
Reinstall the pan and tighten the bolts in a crisscross pattern to the recommended torque. Avoid overtightening to avoid stripping the threads in the aluminum pan or valve body.
What to do with magnets in the tray?
Magnets at the bottom of the tray collect small metal shavings. They must be thoroughly washed in gasoline or solvent. If large chips or chips are found on the magnets, this may be a sign of serious problems inside the box that require diagnosis by a professional.
After installing the filter and pan, fill in new oil through the neck of the dipstick (if there is one) or through a special hole. The oil level is checked with the engine running and the gearbox warm.
Before adding new oil, be sure to check the condition of the filter O-ring. If it is hard or deformed, replace it separately to avoid leaks.
Typical maintenance errors
One of the most common mistakes is choosing the wrong type of transmission fluid. For Nissan Almera Most often, NS-2 or NS-3 standard fluid is required, depending on the year of manufacture and type of box. Using an incompatible fluid may damage the clutches.
Another mistake is to ignore cleaning the magnets. Many craftsmen simply change the filter and pan without paying attention to the magnets. As a result, large chips remain in the tray and circulate in the system.
Often there is a problem with the oil level. Too low a level leads to cavitation and overheating, and too high a level leads to foaming of the liquid and loss of pressure. Use a feeler gauge or sight glass for an accurate check.
A paper or synthetic element loses its properties after the first use and cannot be restored.
⚠️ Attention: Using universal filters without checking compatibility may result in the filter not fitting tightly to the valve body, which will cause air leaks and box failure.
If, after replacing the filter and oil, problems with gear shifting do not disappear, the reason may lie in the valve body or solenoids. In this case, a more in-depth diagnosis will be required.
Cost of service and terms
Replacing the automatic transmission filter with Nissan Almera is a procedure that pays for itself many times over. The cost of the original filter is a reasonable amount, which is not comparable to the cost of repairing the transmission. It is recommended to change the filter every 60,000 - 80,000 kilometers.
The table below shows approximate prices for spare parts and labor (prices may vary depending on the region and service):
| Name | Type | Approximate price (RUB) |
|---|---|---|
| Automatic transmission filter | Original | 2500 - 4500 |
| Automatic transmission filter | Analogue | 800 - 1500 |
| Pan gasket | Original | 500 - 1200 |
| Replacement work | Removal/installation | 1500 - 3000 |
| ATF oil (4 liters) | Low level | 2000 - 4000 |
Regular maintenance can extend the life of the gearbox to 300,000 kilometers or more. Saving on filter and oil often leads to the need for major repairs, which cost tens of times more.
A complete oil and filter change and pan cleaning is the only way to guarantee system cleanliness and long service life of the Nissan Almera automatic transmission.
FAQ: Frequently asked questions
Is it possible to replace the filter without removing the pan?
No, on most models Nissan Almera the filter is located inside the pan and secured with bolts. To replace it, you must remove the pan, drain the oil and dismantle the old filter.
How often do you need to change the automatic transmission filter?
It is recommended to change the filter at every complete oil change, that is, every 60,000 - 80,000 kilometers. If the oil has been changed partially, the filter must still be replaced when this mileage is reached.
Which fluid is suitable for Nissan Almera?
For Jatco JF011E (CVT) gearboxes and classic automatic machines, NS-2 or NS-3 standard fluid is used. The exact type is indicated in your vehicle's service book. Using the wrong fluid may cause damage.
What happens if you don't change the filter?
A clogged filter will block the flow of oil, which will lead to a drop in pressure, overheating, jerking when shifting gears and eventual failure of the valve body and clutches.
Can sealant be used instead of pan gasket?
It is advisable to use a new factory gasket. The sealant is permissible only in extreme cases, if the gasket is missing or damaged, but its application requires strict adherence to technology.
Caring for an automatic transmission requires attention and regularity. Replacing the automatic transmission filter is a simple but critical procedure that will save your Nissan Almera from serious damage. Do not delay servicing if the mileage is approaching the regulated value.