Hi this practice is not a good idea as it does more harm than good generally.
if you have issues with an automatic it usually means something really needs looking at. flushing it cures nothing it might even finish off what is now having issues.
If I only could find my "teen slangish decoder" card. What is "atf flush?" What is "best" about anything as to car service? I must assume this is about a car service.
Most shops that do oil changed will.
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