This is the most non-invasive way to transfuse the fluid. It’s just doing what your transmission normally does. It’s never been that “new” fluid is bad, but the process these Lube shops use with their system that applies different pressures to transmission that may or may not agitate it. All’s I know is my transmission has brand new fluid. And that’s a good thing.Which of the two (2) cooler lines? So the engine at idle will flow fluid through the TC? Is it possibly damaging to the trans to have the fluid run through the cooling line OUT of the system until its empty? I do have two gallons of Dextron. I may need three, actually. Yes? I'm just worried about destroying the second most expensive (and arguably most complex) component on this amazing truck. I'm not worried at all about the "old wives tales" (rumors) that new fluid will ruin an old trans. Just concerned about this process. Thanks guys, I REALLY appreciate it. P
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