The input shaft seal only costs a few bucks, but the transmission has to be removed to replace it.
There is also a vent at the top of the pump. Fluid can make its way up there if it is foaming. That will leak out at the same place on the bottom, but replacing the seal will not solve it. That can be caused by overfilled fluid that is getting air whipped into it by rotating parts, or if the pump is sucking up air. The clue is a pump seal leaks all the time the engine is running. Foaming from the vent only occurs when the car is moving, and it may not occur at low speeds.
Sunday, December 18th, 2016 AT 1:18 PM