Transmission clunking when hand spinning.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by armyguy08, Apr 19, 2020.

  1. armyguy08

    armyguy08 Junior Member

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    I have a 2011 Prius with 145k. I started hearing little noises when the engine kicks on while already moving. I've had sounds that indicate a bad cv joint as well as clunking from the transmission under certain conditions. While inspecting the brakes a year ago, I noticed that spinning the front wheels by hand, there is about 5 inches of travel(at outside of wheel) before hearing a clunking of gears and the passenger wheel starts spinning. Spinning the passenger wheel produces that same thing with the noise coming from the driver side. My first thought was something wrong with the transmission but there is no signs of operational deficiency. Trans oil was changed every 30k after the first 60k change. CV joint seems intact with no noticeable looseness.

    Anyone notice something simlar?
     
    #1 armyguy08, Apr 19, 2020
  2. tankyuong

    tankyuong Senior Member

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    I’d say your egr circuit needs cleaning
     
    #2 tankyuong, Apr 19, 2020
  3. armyguy08

    armyguy08 Junior Member

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    Inspecting the EGR valve is on my to-do list this summer.
     
    #3 armyguy08, Apr 19, 2020
    Raytheeagle likes this.
  4. Raytheeagle

    Raytheeagle Senior Member

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    Don't stop at the valve ;).

    It needs to be the whole circuit(y).
     
    #4 Raytheeagle, Apr 19, 2020
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  5. Montgomery

    Montgomery Senior Member

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    Correct me if I am wrong, but the transmission on a Prius isn't built like regular transmissions and therefore should not be "clunking"?
     
    #5 Montgomery, Apr 19, 2020
  6. Vman455

    Vman455 Senior Member

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    Was the car off when you did this? Anytime it isn't on (or is on and in P), there's a pawl that prevents the transmission from spinning, with a few inches of play.
     
    #6 Vman455, Apr 19, 2020
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