[QUOTE=300EE320;2360757]Thanks - that is an interesting approach. I cleaned a lot of sediment out of the pan, which would be missed if it was just a fluid change. I can't imagine pumping that $15/qt fluid through as if it was a brake fluid flush. I wondered if the front pump on the trans would pump out the fluid even if it was sucking air, until the torque converter was empty.
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The correct method mentioned above (for the Ford Windstar/Taurus) is to drop the pan, change the filter, reinstall pan & refill fluid. Then pull the pump discharge line to the cooler, start the car for maybe 45 seconds (monitoring how much you pump out), stop the car then add the same amount of new fluid back in. The pump never gets dry, and the total fluid used was about 13 quarts.

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Prost!