Question about 1998 Nissan Pathfinder

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Transmission 98 pathfinder LE automatic shifs hard between 1rst & 2nd when cold,hardly noticable when engine is warm, chaned fluid and filter,no noticable change Thanks George

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  • geoandlou Aug 16, 2008

    Thanks it might be a solution...but you are saying that the "CLUCK" between first and second should happen when engine is hot, it happens when engine is cold, its OK when hot......

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  • Nissan Master
  • 19,396 Answers

Often this kind of problem it is caused from faulty throttle position sensor, you find out by connecting a code reader to your car computer.

Posted on Aug 16, 2008

  • Ginko
    Ginko Aug 16, 2008

    throttle position sensor tells to your transmission control module how you are using the throttle, so that the car automatic transmission can shift to right gear, when this is faulty often you have transmission faults related to engine rpms and temperature, this can explain a trans problem happening only when engine is hot.
    In some case it is not the sensor, but the computer module controlling transmission that is faulty.
    To find out cause for the problem you need to connect a code reader to transmission module and to main computer module (ECU).
    The code reader will return fault codes that allow to locate the problem. this kind of job can be done at any qualified garage.


  • Ginko
    Ginko Aug 16, 2008

    The fact is that the fuel injection (volume/ temp) and throttle position are influenced by temperature. I do not know how computer can react if sensor is bad or automatic transmission module is faulty, only way to know what is wrong is reading codes from trans module.

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