What Is the Function of the Transmission Oil Pump?

The function of the transmission oil pump is to provide hydraulic pressure for the control valve and clutch, quantitatively supply the gear oil in the transmission and differential case, and at the same time send the transmission oil to the cooler for circulating heat dissipation.

 

The oil pump is the power source of the entire hydraulic system of the automatic transmission and is generally directly driven by the engine. All automatic transmissions have a front pump driven by the engine, and some transmissions have a rear pump driven by the output shaft. Commonly used oil pumps are internal gear oil pumps, rotor oil pumps, and vane oil pumps.

 

 

There are two oil pumps in the transmission. Two oil pumps are installed in one assembly, separated by a partition. They work at the same speed as the engine. The main oil pump supplies oil to the entire system, while the oil return pump is only responsible for pumping the oil in the torque converter oil sump back to the transmission oil sump without pressure. The main oil pump is much wider than the return pump and has two oil circuits. All the way is lubrication, which provides lubrication for the friction plates and clutch plates of various gears of the gearbox. Another way is to shift gears. It also has the function of lowering the oil temperature and mainly supplies the pressure regulating device. Transmission oil is supplied to maintain sufficient compensation pressure and flow to ensure that hydraulic components can perform their power transfer functions. Prevent the torque converter from cavitation, take away the heat of the torque converter in time, and maintain the normal working temperature.

 

What are the symptoms of gearbox oil shortage?

 

The following occurs when the transmission oil is reduced:

 

• The transmission oil is reduced, the acceleration power is insufficient, and the speed cannot be increased;

 

• If the gearbox oil is too much, the car will not be able to move or walk;

 

• If there is less oil in the gearbox, the parts inside the gearbox will burn out.

 

Transmission oil lubricates, cleans, and cools the transmission. Transmission oil is a consumable item that wears less after a period of use and affects the performance of the transmission. Usually, pay attention to the transmission oil level, you can use the transmission dipstick to check.

 

The transmission oil needs to be changed regularly, usually once every two years or about 60,000-80,000 kilometers. When changing the transmission oil, you should choose the correct way to change it. Automatic transmissions have higher requirements on the transmission oil. It is recommended to use a circulator to change the oil, and the oil change rate is high. What happens if you accidentally add too much gas when refueling?

 

What are the symptoms of excess transmission oil?

 

• If there is too much transmission oil, the fluid level will be too high. When the car is driving, it is easy to come into contact with rotating parts. When the rotating parts agitate the oil, air bubbles appear. After the oil with bubbles enters the oil pump, the oil pressure will be abnormal, which will affect the lubrication effect.

 

• If the transmission oil increases too much, it will cause an air blockage in the oil drain hole on the control valve, resulting in poor oil drain and shifting shock;

 

• If the gearbox oil is increased, the resistance to the gear rotation will increase, thus affecting the transmission efficiency of the gearbox.

 

Conclusion

 

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