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    ATF + 4 Fluid in Aisin

    Have a 2019 3500 Bighorn 102,750mi with Aisin tranny. Dealer has done all tranny service every 30,000mi. At the 60k service they put in ATF+4 fluid, I didn't catch it until 102,500. This dealer we've bought a few vehicles from over time and they have serviced them all. Tomorrow I'm going to...
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