The transmission repairing, what we are repairing for?

1.First, there is no difficult for us deal with the visible maintenance. Such as the burning and abrading of the friction plate and steel plate; the abrading of shaft and adjustment plate; the gaping of bush and so on problems. These are the tangible problems that we can solve by changing some auto parts.

2. Second, apart from the problem we have mention above, there are some difficult repairing problems with the repairing level that we have now. These problems such as the vagaries of shift impact and the powerless of the speeding; the delaying of the time into gear; distinguish between the change lock up and the trembling of the torque converter and so on. In addition, if you want to solve these problems I think the need to meet the following conditions:

A. It is necessary for you to have a whole data. Such as the Mickey\ All data\ZF you should need less one of them. If you haven't have these, it means that you are the blind man feels an elephant.

B. You should have a clear understanding the hydraulic controlling of the automatic transmission.

The worthy notice has: main pressure regulating valve, oil pressure solenoid valve, main oil pressure boost adjust valve, the toque converter locking pressure boost valve and lock function valve. All of the solenoid valves need about 4 kilogram steady working pressure to work well. Like all the engine of the computer, the transmission computer boards need a 5V steady power source. This oil pressure work by the Lord hydraulic pressure (also called pipeline oil pressure produced).As 5V regulated power supply is composed of 12V battery voltage is generated. The solenoid valve which produce the oil pressure it can be find in almost oil line of the electronic controlled transmission. 01N oil pressure solenoid control valve\01V reducing pressure valve\01J reducing pressure valve\AFL of 4T65E solenoid valve\AL4 regulating pressure valve\F4A22/23/33/KM175/176 reducing pressure valve and so on. All along the supply of electromagnetic valve oil can find them the areas of electromagnetic valve hydraulic regulator. We can call it steady valve, because no matter how voltage valve it keep hydraulic unchanged. It is very stable oil pressure .If it is not stable, or too low, can caused shift impact.4T65E first and second shift impact is made by it. There are many reasons for the 01N shift impact.

The second worthy notice is main pressure regulating valve. Its compressor end is abrading the most serious. It is because the leakage caused the oil pressure instability. This is the Lord hydraulic electromagnetic valve high frequency vibration caused by excessive wear, 01 N Lord hydraulic valve often wear the firm, it is the main reason that our serious change "old body" will not solve the problem. The hydraulic electromagnetic valve hydraulic regulators not only give priority to the hydraulic control signal formed by hydraulic pipe (called), and it is also shift in the process of accumulating device back pressure, in 01 V fuel lines in figure we remove can see it for A, B ,E,D and F provide back pressure. During the reparing of the Fengzhixing, we often by changing the Sonnax pressure boost valve make 3-2 impact becomes small, accelerate also become powerful. This is the results of further improvement of oil pressure filling of the torque converter.

The third worthy notice is locking up the valve and the pressure charging valve of the torque converter. It can cause excessive wear cool car into the file or impact, or remove to accelerate. So we through changing the Sonnax lock up valve and the function valve and adding the Sonnax lock up valve to make 01N torque converter looks new again, shift ahead of time, speed up the powerful. Passat transmission will performance incisively and vividly through changing and add large the Sonnax main oil pressure valve\pressure charging valve\the pressure charging valve and function of the torque converter. The main oil pressure solenoid valve of KM175/F4A2 transmission is different from the solenoid valve we have said above. It just make a difference of the speed of the oil filling. 01J is again many a oil cooling oil line. It is also based on provideing4 kilogram steady oil pressure by oil pressure solenoid valve, through the cooling hydraulic electromagnetic valve to realize control the flow of oil cooling.

C. To have a basic test equipment. Such as hydraulic table, flow meter, test computer. It is better have a more accurate oscilloscope, meet with troubleshooting, can do further identified.

D. To have a circle of friends which solution to problems as the center, we learn from each other, and use for reference each other, also can praise each other.

                                                                                                                                          JACK