There are three main ways to replace automatic transmission:

1.   Similar to the way of changing engine oil, oil is discharged and refilled by unscrewing the oil drain screw of the transmission.

2.   Directly remove the oil sump for oil discharge and injection.

3.   The more advanced transmission flush machine  automatic to replacement transmission oil.

The first two methods are widely used at present, because the price is cheap (less oil change), but there are disadvantages, is that the traditional gravity oil change method cannot"completely" replace the transmission oil,but the transmission flush machine fills this defect.

Is the transmission flush machine really work that well?

Automatic transmission  developed so far,the internal electronic and hydraulic control has become extremely complex, soregular maintenance of automatic transmission is particularly important.

Generally speaking, the term of automatic transmission oil replacement auto manufacturers are recommended in 60,000-80,000 km or 2-3 years or so (4S stores will suggest shortening there placement mileage), some brands even proposed lifelong maintenance free.

But the maintenance proposal that original factory provides is to be based on many respects consideration, do not replace oil of automatic transmission case in time to still can affect the performance of the vehicle directly, fuel consumption is the service life of automatic transmission case even.

Manual oil discharge or removal of the oil sump of the transmission can only replace about 70% of the waste oil in the transmission by unscreeching the oil discharge screw under the transmission,which is not only incomplete but also leads to the contamination of the new oil.

Why use equipment to change oil?

Maintenance shop is still using the traditional manual oil change method for the owners of automatic transmission  oil.Although it is easy to operate and takes less time, it is not complete to change the oil, and only two-thirds of the old oil can be removed at most.

This change of oil, although less oil,seems to be cheap, but on the one hand, the automatic transmission of metalim purities and grease can not be discharged, is still in the gearbox,Will further aggravate automatic transmission wear, On the other hand,new oil and old oil are mixed together, The technical parameters of oil products have been changed, Automatic transmission oil service life and performance will be greatly reduced.

Amount of circulation, by contrast, oil change, oil change machine first cycle cleaning the metal impurity in the automatic transmission and oil dirties, reuse circulation oil change machine pressure, the transmission of oil in the lubricating oil pipe and heat pipe for dynamic change, the advantage of this approach is an oil change is complete,and can put the inside of the automatic transmission oil dirties and metal scrap clean, can be more thorough and efficient maintenance and automatic transmission.

             Before the oil change                                             After the oil change

In the process of cycle machine replacement, the alternation of old and new oil is just like doing hemodialysis. The alternation of old and new oil can be clearly seen through the window. The color of old oil window changes from dark black to red gradually until the color of old and new oil is consistent.