P0744 – 2001 Nissan Maxima

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    David Fields
    David Fields

    Hello, I have a 2001 maxima
    Transmission jatco model RE4F04B
    Around 202k miles it got p0744
    Shifting very bad.

    I noticed the fluid very dirty.
    So I did a slow ATF flush
    Doing 3 drain and fills with few thousand miles between each.
    ATF used , valvoline maxlife full synthetic
    I also used Lucus transmission fix stop slips on first 2 drain and fills. And seafoam transtune just before the 3rd drain and fill. It helped clean up stuff and you could feel the difference. On last drain and fill I used only transmission fluid and later. Added LUCUS again. (I could feel that it needed it)
    Maybe some valve or solenoid is leaking/sticking and “hammering”

    P0744 still comes up but not as much after LUCUS and seafoam after the 3rd drain and fill ( ATF Flush ). It also drives and shifts 95% better than when this first started. I was able to get it to pass state emissions test. Barely on Retest . Looks like I have O2 B2S2 starting to go (p0160)

    My question is do you think changing the shift solenoids block would resolve the issue p0744
    (Nissan part #31940-85X01
    or 31940-85X0B)

    Or should I be concerned that torque converter or entire valve body needs replacement also?


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