Dynamic oil change

A word of introduction: automatic transmission requires a high-quality fluid called ATF (Automatic Transmission Fluid) for its operation. It is this oil that the entire transmission system operates in. It drives the cylinders, lubricates and cools the entire system. It has increased pressure resistance, resistance to aging, foaming and does not react with sealing elements. The right oil level, quality and type are therefore very important. Because the use of the wrong fluid, its low condition, overheating or loss of its properties causes the automatic transmission to malfunction and, as a result, leads to a rapid damage, we recommend having it replaced and its quality and level checked by specialists.

Oil change in the automatic transmission can be done by static and dynamic method. When using a static method, we drain used oil using a drain plug or by dismantling the oil pan, then replace the ATF fluid filters (if present) and refit the oil pan, topping up the oil level. Then, with the car running, all lever ratios are tested, and the oil level is again checked through the dipstick or the control hole. Its temperature is also checked. This is a very simple and quick method, but it is not possible to replace all the used oil in the transmission in this way. Most of the fluid is still in the components, which after starting the engine mixes with the new, reducing its quality right from the beginning. Therefore, static change is more refreshing than real oil change.

For car users with an automatic transmission, we recommend using dynamic oil change. This method is admittedly more complicated, and it is necessary to use the appropriate device to perform it, but it is also much more effective. 98% of the fluid in the entire transmission system is replaced. This method involves applying a cleaning agent to the transmission system, which then pushes out the old oil through the pump in the machine and a series of filters and pushes in the new oil until the oils are completely exchanged.

At the very beginning, after connecting the cleaning device to the oil inlet and the return from the radiator, we conduct rinsing with a cleaning agent that dissolves deposits and sediments in the narrow channels of the system. With the engine running, we change gears in sequence, which allows us to rinse all the places where the oil reaches. Then we drain the oil from the transmission, install and clean the oil pan and its magnets, replace the filter and fill the transmission with new liquid. The filling of the transmission itself can be done manually or through the device (we recommend using a pump, because the new oil will reach all elements and after launching the transmission, it will not have to work “dry” even for a moment. In addition, there will be no air block and seizing of the automatic transmission pump).

When the right amount of oil is poured into the transmission, we proceed to a dynamic oil change. We start the device and the car and select all ratios one after another. The transmission pumps fluid into the waste oil tank in the device, the pump of the machine pushes fresh fluid into the transmission. The quality of the oil poured out of the transmission is also monitored on an ongoing basis. This process continues until pure, clear oil begins to pour from the transmission. Most often, dynamic oil changes consume about 30% more fluid than the capacity of the transmission. When the oil poured out by the device is clean, we finish the change process and disconnect the device from the car. Finally, we control the ATF fluid level.

In summary, the dynamic oil change in the automatic transmission along with its flushing significantly improves its efficiency and often also extends its service life. The agents we use when rinsing the transmission have great rinsing properties and are safe for sealants and other rubber components. Even the best-maintained automatic transmission exhausts friction elements of clutches and brakes, and the metal fractions resulting from friction circulate in a closed system of the transmission, accumulating in its narrow channels over time. We recommend that you do not postpone oil change times.