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2001 Nissan Maxima Slipping in 3rd gear, P0744

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here 2001 Nissan Maxima Slipping in 3rd gear, P0744

This topic contains 1 reply, has 2 voices, and was last updated by Dave Tidman Dave Tidman 1 month ago.

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  • #988551
    David Fields
    David Fields
    Participant

    2001 Nissan Maxima Slipping in 3rd gear, P0744
    Thank you in advance.
    2001 Nissan Maxima
    transmission JATCO RE4F04B 4sp Auto
    P0744
    215K miles.
    Engine Runs really good
    Transmission : ok in 1, 2, and reverse
    4th unsure if it even shifts into it.
    3rd is fine as long as you don’t floor it, then it slips into Neutral
    if you let off gas it slips right back into gear

    ATF Fluid : Valvoline MaxLife Full Synthetic with Lucas

    history :
    around 202k it was shifting very bad , barely moved, and fluid was black but didn’t smell bad.
    so I did a slow ATF flush, via 3x drain and fill with few thousand miles between each
    along the way used lucus and Seafoam TransTune.
    This made it drivable and the more it was driven the better it got and got better with each drain and fill.

    My thoughts are its losing hydraulic pressure on the TCC causing it to slip in and out of gear.
    I have heard that the solenoids over time get worn out and need replacement, and cause this symptoms.
    but these same symptoms could also be other, more serious things. anyway to differ between them?
    I am thinking it needs a new shift solenoid block which includes TCC and all other solenoids
    but I am aware of it could also be a warned out clutches.

    I am just throwing this out there for the form for their thoughts.
    is the transmission toast ?
    would a new Shfit solenoid block and filter fix it ?

    cost ranges estimate
    1) Shift Solenoid block replacement (valve body will need to be removed but transmission can stay in car)
    2) replace entire valve body with re-mfg one, that includes the new shift solenoides
    3) rebuild transmission
    4) replace transmission with used one from junk yard

    on 3 & 4 would also include replacement of rear main seal

    your thoughts
    thanks
    Busy Dad Trying to save Son’s first car.

    • This topic was modified 1 month ago by David Fields David Fields. Reason: typeo
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  • #988555
    Dave Tidman
    Dave Tidman
    Participant

    P0744 is an intermittent code, so could be the solenoid or other things. Debris in the fluid could cause this code. IF it’s not too hard, I would pull the pan and look for metal in the pan, that could give you a quick answer on which option to try.

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