Question about 2004 Jeep Grand Cherokee

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Transmission Speed Sensor Inconsistency

My automatic transmission shifts into overdrive often and for no reason while at highway speeds. I'm told it is a bad speed sensor. I'm also told that to fix this, the entire transmission must be removed and taken apart. Is this true?

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  • craig730 Nov 27, 2008

    Is the throttle position sensor replacement an expensive repair?

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Check the 10 wire connector going into the transmission for water or corrosion. This could cause inadvertant shifting but would also probably set the check engine light. The throttle position sensor could also cause this. Speed sensors screw into the transmission from the outside and would cause a limp in condition where it wouldn't shift out of second gear.

Posted on Nov 24, 2008

  • SM124 Nov 28, 2008

    Part runs about 50-75 dollars. Located on the throttle body with 2 screws.

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