Where is the INPUT SPEED SENSOR?
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Northstar Engines and System Technical Discussion Discussion, Where is the INPUT SPEED SENSOR? in Cadillac Engine Technical Discussion; Where is the input speed sensor ? And, Can i replace it myself? I know its near the tranny i ...
  1. #1
    rlowe228's Avatar
    rlowe228 is offline Cadillac Owners Member
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    Where is the INPUT SPEED SENSOR?

    Where is the input speed sensor ? And, Can i replace it myself? I know its near the tranny i think.

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Where is the INPUT SPEED SENSOR?

    It's $2000 deep inside the tranny.

  4. #3
    ewill3rd is offline Cadillac Technician
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    Re: Where is the INPUT SPEED SENSOR?

    Ranger is right, if we are talking about a 4T80, it's behind the channel plate between the chain sprockets.
    It reads the teeth on one of the drive sprockets itself.

    You have to essentially remove the side of the transmission to get to it.
    Most places will charge between 8 and 12 hours for this repair, plus parts.
    The ISS itself is not expensive but there are a few gaskets you have to replace and fluid of course.

  5. #4
    auroradude's Avatar
    auroradude is offline Cadillac Owners Fanatic
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    Re: Where is the INPUT SPEED SENSOR?

    Honestly I would just rebuild the transmission while you're at it....

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