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  1. Poorgirl87

    4l60e

    Has anybody tried the seafoam transtune in their 4l60e? I am desperate! My tranny quit shifting out of the blue while cruising the interstate. Got her towed home, replaced silinoids and filter , got 1st, 2nd and reverse back beautifully. 3rd Is a no go. Last hope is this seafoam before replacing...
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