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98k miles with slight vibration/studder feeling at low speed.

Discussion in 'Gen 2 Prius Main Forum' started by defrankond, Jul 20, 2014.

  1. defrankond

    defrankond Member

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    Vehicle:
    2010 Prius
    Model:
    IV
    98k miles and if the car is on a slight incline and your backing up or creeping forward it feels like you are going over a rumble strip. that slight studdering feeling. no codes have tripped. ive asked the toyota dealership and they dont know what could be the problem. the transaxel fluid was changed at 88k and from what i was told there were no metal shavings in the fluid. it was a little dark but after going 88k miles i assume it would be. any insite would be helpful.
     
  2. tanglefoot

    tanglefoot Whee!

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    My 2007 has done that since new. I notice it most when pulling up the driveway and into the garage. I'm pretty sure it's just a characteristic of electric motors--their operation, under load, is much less-smooth at low speeds. I've noticed other electric motors that produce similar shudder when under load at low speed.
     
    #2 tanglefoot, Jul 24, 2014
    Last edited: Jul 24, 2014
    Daves09prius likes this.
  3. PriusFan06

    PriusFan06 Member

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    Same here. I bought my Prius used. It's at 55k miles. 2006 and whenever the electric motor starts or turns off, the car does studder a little. I don't think it is nothing to be concerned about unless this studder is like driving over a speed bump.
     
  4. defrankond

    defrankond Member

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    That is normal when the engine kicks on and off. I'm talking about vibration from the electric only motor. The ICE is not running when this happens
     
  5. Rocket Man

    Rocket Man Junior Member

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    This is normal for an AC motor running at low speed (which both MG1 and MG2 are). The moving part (rotor) is trying to follow the rotating magnetic field generated by currents coming from the Inverter.
     
  6. JC91006

    JC91006 Senior Member

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    Studdering when you first take off from a stop could be a sign of a failing mg2 in the transaxle