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Thread: Changed OS now 4L80 won't shift

  1. 04-20-2017 #1
    monte4ever
    monte4ever is offline
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    Changed OS now 4L80 won't shift

    Been using 4L80e for years without a problem. I changed to a Flex Fuel 2bar OS (12216125) and did the 4L80e segment swap for the OS but now the trans will not shift. When I put it in gear for the first time it will shift normally, then after coming to a complete stop it will not go to first and seems to be stuck in second. When I command any gear with the scanner they all engage while moving. I don't have a log of the problem but any suggestion of what's going on is appreciated.
    Last edited by monte4ever; 04-21-2017 at 03:35 AM.
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  2. 04-24-2017 #2
    monte4ever
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    Fixed. Bad segment swap file.
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