Transmission pumps essentially pump the transmission fluid throughout the transmission system. It is more like the heart of the vehicle transmission system. The pump has two gears. One is inside gear which is powered by torque converter while the other is outer gear, driven by the inner gear. These two gears suck up the fluid as they run and rotate together. This suction effect moves the transmission fluid.
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The hydraulic system becomes more effective as the pressure increases. The gears create pressure in the transmission fluid and thus increase the pressure inside the hydraulic system. Transmission builds hydraulic pressure to allow other parts of the transmission to work.
The pressure helps to push the transmission fluid and hence set the clutch, valves and clutch bands in motion. It also lubricates components of the automatic transmission as well as transmitting the fluid to the cooler.
Signs of a bad transmission pump
Illuminated Engine light
A common sign of a problem in cars is checked engine light illumination. This sign can indicate an array of problems in your vehicle. So you will need an error code reading machine. If you can’t access one always take your car to a reputable repair shop.
A faulty pump will fail to circulate transmission fluid, as it ought to do. Therefore the transmission will overheat burning the transmission fluid. A smell of the burning fluid is a telltale sign of a bad pump. The fluid will also be abnormally darker. You should note that this sign also happens when the transmission fluid level is low. Be sure to confirm first.
Hard shifting occurs when the gears are not well lubricated. This problem occurs when fluid is not properly pushed into the transmission. In a manual transmission, it will be hard to move the shift lever into place. In an automatic transmission, this will display by hesitation when accelerating.
When the transmission components are not well lubricated, the friction causes a lot of noise. The nose can get louder as some parts wear out.
Causes of transmission pump failure
The main cause of transmission pumps failure is insufficient fluid. The pump will have nothing to pump and can cause overheating, or even the pump is burning up.
If the transmission fluid is contaminated with water or other substances, it can cause serious problems to the pumps. Contaminated fluid may cause corrosions in transmission components or damage.
If other components such as gears wear out the pump will not be able to maintain the suitable fluid pressure to perform its job properly.
Learn more about your vehicle’s transmission: