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    6R80 Problem

    I took the car out yesterday and within 20 minutes it revved while trying to engage 1st gear from a stop three separate times and then at one point, it died on me. Cranked right back on, but still weird. Dropping it off with the mechanic again today for him to drive it for a day or two...
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    6R80 Problem

    I found this information and although it’s not regarding Mustangs, this is what happened to me. So perhaps the problem is the OSS sensor? Safety recall for select 2011-13 Ford F-150 vehicles with 6-speed automatic transmission shift issUes Ford is issuing a safety recall on select 2011-13...
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    6R80 Problem

    JEWC_Motorsports, are you saying that the issue with the shifting and speedometer could be due to the tune being set up incorrectly? And if so, would the stock set up possibly fix the problem? I’ve only driven it about 25 miles since he changed the transmission tune back to stock and it has been...
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    6R80 Problem

    You’re right, the transmission isn’t “new,” but it is remanufactured. I definitely won’t be driving it on the freeway until we figure out what is wrong. Someone suggested that I possibly have a bad speed sensor so I’ll have that checked out as well. Unfortunately there are no codes showing...
  5. F

    6R80 Problem

    I just purchased a 2014 Mustang GT that had a procharger already installed. The car had a bad auto transmission that I had replaced. I’ve got about 200 miles on the new transmission. Today while driving on the freeway, the car downshifted violently for no reason. It was like I slammed on the...

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