Question about 1999 Hyundai Sonata

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My 1999 Hyundai sonata,won't go above 55 miles.

Well I be driving my, 1999 Hyundai sonata, on the highway. After going a good 7o miles per hour the car speed drops tremendously to 55 miles per hour. It will act normal once it sits for awhile. When the gas is hit it won't go any faster. Also sometimes it tend to **** really hard. It that a transmission problem or something else.

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  • Rafael Chavez
    Rafael Chavez May 11, 2010

    does it have cruise control?

  • Dan Doherty
    Dan Doherty May 11, 2010

    Is this a manual or auto?

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I have the same problem..but mine has a hard time getting up to 55 ..it also does the hard shift thing and will not excelerate going up any kind of hill.I've already replaced the input..output speed censor's and had a tune up...it has about 116,500 miles on it and i dont know if its the transmission causing the problems.

Posted on Mar 28, 2010

  • Kristi18 Oct 16, 2010

    Mine does the exact same thing. Nobody knows what it is?

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