Adding Trans Tune to transmission fluid [SOLVED] Asked by Kenneth T. In Tennessee Do I need to drain 16 oz of transmission fluid to add the 16 oz can of Sea Foam Trans Tune?
Hi Kenneth. Unless your transmission fluid is overfilled, there is never a need to drain any fluid before adding Trans Tune. All you do is remove the ATF dipstick and pour a whole can down the filler neck using a funnel. All very easy to do!