Question about 1990 Nissan 300ZX

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1990 300 zx transmission problems

My 300 zx has problems shifting into third gear. It runs fine, when I get up to 50 Mph it seemslike it stuck, and their is a wierd noise coming from the back. Could this be transmission and or my differential going bad.

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  • mattivester3 Feb 04, 2009

    I have the same problem the code was shift solenoid i replaced them nat a fix so i replaced the tranny still the same and now everyone is saying computer or wireingharness i'll keep you updated as i replace them

  • Titus Green
    Titus Green Mar 08, 2013

    check vehicle speed sensor

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I also have a 1990 300zx N/A 2+2, the transmission is computer driven, as is almost everything on the car has different computers.
1st look at the fluid and fluid level, make sure that it is red or pink, not black, smell it and if it smells burnt, you might need to replace the tranny, due to that's a bad sign of internal damage. next I would try a junk yard for the computer and try that, finally I would go to a trusted mechanic and have them diagnose your problem, unless you have a good mechanic that will diagnose the car for around $50, then go there first, due to the complexity of the transmission.

Posted on Jan 28, 2009

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