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Nissan Maxima not shifting into O/D

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  • #954229
    David FieldsDavid Fields
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      Nissan Maxima not shifting into O/D

      2001 Nissan Maxima about 207k miles

      Previously it did have some bad shifting issues
      P0744 and wash shifting very bad
      Fluid was very dark. At 202k miles I did drain and fill and a 2nd drain and fill at 205k miles
      ATF both times looked black but 2nd time looked a little better. Shifting got a lot better both times. It use to have issues with 1-2 shift and starting from complete stop.

      At 206k miles I pumped out about 16oz
      ATF and added 16oz cab is seafoam trans tune
      Very soon after it was shifting a lot smoother
      And the 1-2 shift issue was smoother
      And later in starting from a complete stop
      After adding seafoam vid

      2nd drain and fill vid with Lucus and valvoline maxlife synthetic ATF

      Now it’s not shifting
      into O/D D4 consistently but other shifting
      Is a lot better

      Plans in about 700 miles do another ATF drain and fill but with out additives to see how it is
      I will be using full synthetic ATF

      Could this be also be

      transmission fluid temperature sensor failing
      Throttle position sensor (TPS) failing
      Fluid too think from first 2 drain and fills using Lucus additive.

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    • #954231
      David FieldsDavid Fields
      Participant

        Also p0744 CEL is still tripping

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