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Can a bad PCM make a tranny fail?

Discussion in 'Stock 2002 - 2005 Explorers' started by Oldwolf, April 9, 2012.

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  1. Oldwolf

    Oldwolf Active Member

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    City, State:
    Cary, NC
    Year, Model & Trim Level:
    2002 XLT, 4x4, 4.0 SOHC
    Is there anyway a faulty PCM (powertrain control module) can make a 5R55W transmission fail? Such as the losing high gear and destructing the high gear band?

    The engine is running fine still and the problem originated when I was cruising down the highway and all of a sudden lost OD and 5th with a thud.

    The dealer installed a new factory rebuilt transmission because this is a 2 yr old rebuilt unit.

    The new one he just installed replace would not shift correctly and also it had a bad front pump.

    Working with FOMOCO they have rebuilt the new unit they just installed. However the forward pump started squealing immediately so the had to remove the tranny again, replace the pump, and reinstall. Tomorrow they will test the unit again.

    Dealer is saying the "readings" from the PCM were not consistent and that intermittent problems in the PCM signal could have made the tranny fail in the first place.

    Is this a possibility?

    Thanks for your comments.
     
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  3. RKelly2233

    RKelly2233 Active Member

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    Year, Model & Trim Level:
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    i dont know if it would make it fail...currently @ 190k on my 03- orig tranny, no rebuild. I did a pcm flash @ 160 i think and it made an amazing difference- shifted smoother. I flushed @ 100, 150, and will again at 200.
     
  4. imp

    imp Well-Known Member

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    IMO, very unlikely. imp
     

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