2010 transit connect , unhook the lower hose on the trans cooler and attach a lenght of hose to it. place hose into a container.Start the engine and let idell and pump out 3 qts of fluid shut off engine. Measure it in the catch container.. then add 3 new qts to the trans. Then repeat this proccedure( pump out 3 and add 3) Then pump out 3...reattach the lower transmission fluid line to the cooler and add 3 more to the trans. use Mercon LV fluid.