Automobile gearbox maintenance?

The common problems of automatic transmission are:

1. Impact while driving

2. Vehicle skidding, weak acceleration, weak starting, or even unable to start.

3. Shift and impact, shift and flameout

4. Abnormal sound of hydraulic system such as bearing, differential, main rotating gear and oil pump.

The maintenance of automatic gearbox should make different corresponding measures according to the different reactions of the car. The general maintenance process is as follows:

1. Before disassembling the automatic transmission

Before disassembling the automatic transmission, be sure to check whether there is a corresponding automatic transmission model in stock. If the minimum wearing parts and necessary replacement parts cannot be guaranteed to be sufficient, it is not recommended to disassemble them immediately. You can drain the gearbox oil first, remove the USB flash drive and check the impurities in the residual oil. Under normal circumstances, the wear of clutch plate is dark brown or dead powder, and the wear of oil pump, one-way clutch and gear mechanism is bright white metal powder, thus further judging the fault of automobile.

2. When disassembling the automatic transmission.

Due to the limitation of the shape and position of the underbody, it is often not enough to directly remove the gearbox from the rear of the engine. The reliable way is to hang it on the car with the engine. When pulling the automatic gearbox away from the engine, it should be pulled along the axial direction, rotating forward and backward around the axis, but it is not allowed to swing up and down, so as not to destroy the surface condition and cooperation of the connection ratio between the input shaft of the automatic gearbox and the hydraulic coupler or torque converter.

3. Disassembly and assembly of automatic gearbox

Prepare tools and small boxes with various parts first, and disassemble them on a clean and flat operating platform, starting from the front oil pump, from front to back, from outside to inside, and make records. When disassembling, you must remember that you can't knock directly with a crowbar and iron, because most of the automatic gear boxes are made of aluminum alloy. When removing the hydraulic control valve body, ball, snap ring, etc. Should prevent the upper and lower valve bodies from falling off when they are separated. Remember the correct position accurately. When disassembling the one-way clutch, pay attention to the correct assembly direction, and do not install it backwards. After the parts are disassembled, they should be cleaned with gasoline to ensure the cleanliness of all parts. If new clutch plates and brake pads are replaced, they should be soaked in gearbox oil and assembled only after the oil is fully absorbed. In addition, it must be noted that the screws should be tightened strictly according to the specified torque during assembly.

Most of the faults of automatic gear are caused by improper use of the owner. For example, it is considered that the automatic oil stop does not need to be replaced, and the automatic water stop is ignored.

Hua Teng gearbox reminds the majority of car owners to use the vehicle correctly in normal driving. Once the car has problems, it must be sent to a professional company for inspection and maintenance in time to avoid serious accidents!

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