Common questions

Why does my automatic transmission keep foaming up?

Why does my automatic transmission keep foaming up?

Moreover, automatics can also jerk when braking. In any case, if the transmission starts jolting, then it is time to check the transmission fluid. As has been mentioned before, the main reason for ATF foaming is the incorrect fluid level.

When to check for ATF foaming in transmissions?

At the initial stage, the main symptoms of ATF foaming are kicks and jolts when driving and shifting from P and D or R. Moreover, automatics can also jerk when braking. In any case, if the transmission starts jolting, then it is time to check the transmission fluid.

What causes a dip stick to become foamy?

Causes of ATF foaming In most cases, bubbles on transmission dip stick caused by insufficient ATF level or its overflow and you might need to contact your local transmission mechanic. If the fluid is above the norm, the foam is formed when moving elements inside the transmission unit “grab” the fluid in the pan and make ATF foamy.

What happens if you put too much transmission fluid in your car?

Turn on the engine and bring it to normal operating temperatures before you check the dipstick. Slowly add transmission fluid until you get to the optimum level on the dipstick. Using too much transmission fluid in your car can damage your transmission in the long run.

What causes the fluid in an automatic transmission to foam?

Depressurization of the oil passage, leakages of ATF through seals and gaskets can lead to the fluid foaming, too. In some cases, ATF becomes foamy because of severe contamination or failure of the automatic transmission filter.

At the initial stage, the main symptoms of ATF foaming are kicks and jolts when driving and shifting from P and D or R. Moreover, automatics can also jerk when braking. In any case, if the transmission starts jolting, then it is time to check the transmission fluid.

How can you tell if your transmission fluid is overfilled?

The transmission will have to wait for these unlubricated parts to engage before shifting the gear. One of the telltale signs of an overfilled transmission fluid is the presence of a puddle underneath the transmission. The fluid often has a reddish color. This will help differentiate it from other types of automotive leaks.

Causes of ATF foaming In most cases, bubbles on transmission dip stick caused by insufficient ATF level or its overflow and you might need to contact your local transmission mechanic. If the fluid is above the norm, the foam is formed when moving elements inside the transmission unit “grab” the fluid in the pan and make ATF foamy.

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Ruth Doyle