Engine replaced, but new issue?

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by fos4110, May 20, 2026 at 12:23 AM.

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  1. fos4110

    fos4110 Junior Member

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    Hello all - I hope you can help with a dilemma I'm having with my 2014 Prius Plug-In.

    I bought the car used three years ago with 133K miles on it. It ran fine until I started experiencing engine issues.

    I replaced the engine in February and right after I replaced it I started noticing I slight "whirring" noise, especially when I coasted in drive and "b" mode. I especially hear it when I'm driving over 50 mph.

    I've been told by at least two sources it is the transmission, and one transmission shop told me it could run like this forever, or could go out at any time.

    I'm sure someone besides me have had this issue, and am hoping I can get some idea what my next step would be. FYI, the car currently has 260K.

    Thanks for your time!

    Mike in Tacoma
     
    #1 fos4110, May 20, 2026 at 12:23 AM
  2. Brian1954

    Brian1954 Senior Member

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    It could be a wheel bearing.
     
    #2 Brian1954, May 20, 2026 at 2:09 PM
  3. bisco

    bisco cookie crumbler

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    post this in the appropriate gen 3 forum for more eyes, the drive train is the same, and there aren't many pip owners around anymore.
     
    #3 bisco, May 20, 2026 at 2:19 PM
  4. bisco

    bisco cookie crumbler

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    who did the work? what engine did you replace it with? I wonder if it could be the clutch.
    have you replaced the tranny fluid?
     
    #4 bisco, May 20, 2026 at 2:26 PM
  5. Brian1954

    Brian1954 Senior Member

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    I disagree. Do not create duplicate threads for the same problem for the car. Information is then scattered across two different threads, which becomes very confusing.
     
    #5 Brian1954, May 20, 2026 at 2:28 PM
  6. bisco

    bisco cookie crumbler

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    agreed. but he's not likely to get knowledgable engine advice here
     
    #6 bisco, May 20, 2026 at 2:32 PM
  7. Brian1954

    Brian1954 Senior Member

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    Who says it is an engine problem? It could be a drive line problem or a wheel bearing problem.
     
    #7 Brian1954, May 20, 2026 at 2:35 PM
  8. bisco

    bisco cookie crumbler

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    very possible, but still not likely to get much help in this dead forum
     
    #8 bisco, May 20, 2026 at 2:37 PM
  9. Brian1954

    Brian1954 Senior Member

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    Many people browse this PriusChat forum and look at "recent posts". They will see this thread just like you and I did.
     
    #9 Brian1954, May 20, 2026 at 2:40 PM
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