Description of the transmission pump function
and how we repair it in your automobile.

Our shop technicians are experts in transmission pump repair.

The transmission pump is like the heart of your transmission, pumping hydraulic transmission fluid through the system. Referred to as a gear pump, the transmission pump has two gears. One gear is powered by the torque convertor hub which engages the inside gear of the pump. When we repair or install the torque convertor or the pump at The Lake Worth Transmission Repair Shop we are careful to perfectly line up the torque convertor with this inside gear to make sure the gear is connected properly so there will be no malfunction.

The other gear in the pump is the outside gear which is driven by the inside gear. When these two gears run and rotate together they create a suction effect that moves the transmission fluid. As the pressure increases the hydraulic system becomes effective.

This produces pressure to push the transmission fluid and thus set in motion the valves inside the valve body and also the clutch and clutch bands as well as lubricate all the parts inside of the automatic transmission and send the fluids to the transmission cooler.

When the transmission pump fails and we have to makes repairs we have discovered several problems. One is a defective new pump that was installed into the transmission when the car was built. Another is a poor job by a transmission rebuilder that installed the wrong gaskets. A bad or worn out inside gear will also cause the pump to fail just as a busted pressure relief spring.

When you have a pump going bad you will usually hear a whirring noise coming from the transmission. When you bring your car into our shop to have a transmission diagnostics testing we will test the pressure with the car running to see if there is a problem with the pump and will notify you if it needs to be replaced and if there are any other issues with your automatic transmission repair.