As HMAC said, black fluid is a bad thing with an automatic transmission. It means the fluid got hot and glazed the clutches and the steels internally, creating more heat which burns the additives in the fluid and turns it black. Rebuild or replacement is about the only repair for that. If the rest of the vehicle is in good shape either option could be good.
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Saturday, December 10th, 2016 AT 4:27 PM