1997 Ford F250 SuperCab Logo
Posted on Dec 05, 2009
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Overdrive light on shifter is flashing on my 1997 f-250 automatic 7.3 deisel

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  • Expert 104 Answers
  • Posted on Dec 05, 2009
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IT IS LETTING YOU KNOW THAT YOU HAVE A TROUBLE CODE IN THE TCM (TRAN CONTROL MODULE) COMPUTER MOST OF THE TIME IF ITS FLASHING,IT WILL EITHER NOT SHIFT INTO OVERDRIVE,OR SHIFT WEIRD,USUALLY IT WILL GIVE YOU REASON TO CHECK THE TRANS, IT COULD BE A SIMPLE AS THE O/D SWITCH IS BAD, & IT IS TELLING YOU THAT O/D CANNOT BE TURNED OFF.

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