What about a higher mileage transmission where you don't know it's service history. Mine has 233k on it. The fluid looks good a little dirty but smells and seems to be fine. I would like to run Mobil 1 in it but am not sure if it will do more harm than good. I just got 8qts of Valviline(sp?) Max Life fluid for it. What say you?

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200