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you have a bad speed sensor. its not detecting that your slowing down. need to fix pronto!

shiftingAre you saying that when you start off at a light you are in 3rd gear? then yes it may be a speed sensor. Otherwise on any decent automatic transmission you wont be able to feel it downshift, the action will be too smooth to detect without manually shifting it from D to 2 in which case you will definitely feel it.Then again if you are referring to no passing gear then it will be the kickdown solenoid, in many vehicles this was a mechanical cable or rod attached to the carburetor and in other cases a vacuum line to a diaphragm on the transmission, now a days i believe it is all solenoid activated.
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โˆ™ 2011-09-14 00:03:26
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Q: Why doesn't your 2000 Jeep Grand Cherokee downshift?
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