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Rear wheel bearings

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by spiderman, Sep 20, 2014.

  1. spiderman

    spiderman wretched

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    It appears at 59,000 miles my rear bearings are gone. For past year and a half I have noticed a "whaa wahh whaa wahh" oscillating sound from the car as I approach 40-45 mph and it increase until about 60 where it is a constant whine. For a while I thought perhaps it was the oem tires since they are all but bald now. But alas I jacked up the rear and rotated the tires and they roll rough and it feels like there is dirt in the bearings. Only one side seems to have a little play though the other is solid. Fortunately the front tires spin smoothly.

    I called the local parts dept. (#42450-47040) and they want $320/hub! Just finished up an Amazon order and I will get two shipped for $364. Pays to look online.

    So now I need to get mentally prepared to do the job and was hoping to get some insight on the task. Anyone successfully done it? Hints/tips? I did see a youtube vid, but wasn't terribly helpful.

    Thanks!

    [edit] video of the sound: http://vid449.photobucket.com/albums/qq215/spideyatwork/car/DSCN0280_zps2fdc24bf.mp4

    [edit] second video of the sound: http://vid449.photobucket.com/albums/qq215/spideyatwork/car/DSCN0377_zps1ff5bbdc.mp4

    [edit] video of new hub sound: http://vid449.photobucket.com/albums/qq215/spideyatwork/car/DSCN0382_zpsf0a2e5f6.mp4
     
    #1 spiderman, Sep 20, 2014
    Last edited: Sep 27, 2014
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  2. lester williams

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    Wow,, 59,000 miles and gone? No words of wisdom from me, not familiar with this at all, it would appear to me that they are pressed on and sealed. My reasoning for even posting this is to see if there is any ''preventive'' steps to avoid this situation...
     
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  3. caedward

    caedward Junior Member

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    Premature wheel bearing failures can usually be traced back to bumping or running over curbs.
     
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    I recently took off the rear rotors, so was basically looking at the hubs. On one side the rotor was loose, just pulled off, but on the other side it had rust-bonded, wouldn't budge.

    For breaking loose stuck rotors, there's 2 threaded holes in the rotors, that accept M8x1.25 thread. You want to get a pair of those bolts, say at least an inch long.

    For me, the threaded holes were somewhat corroded, to the point that I was sceptical that I had the compatible thread (even though I've used these bolts in past on a drum brake). I just persevered, cleaning out the threads with a blower, screwing the bolt in carefully, then out. Eventually got both bolts through, then start screwing them in, against the bearing assembly front face.

    Did one bolt a half turn, then the other, back and forth, until eventually the rotor popped loose. It was quite noisy when it did.
     
    #4 Mendel Leisk, Sep 20, 2014
    Last edited: Sep 20, 2014
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  5. bestmapman

    bestmapman 04, 07 ,08, 09, 10, 16, 21 Prime

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    I just did the right rear two days ago. I had the wha wha wha for a while and decided to just do it. It took about 3 hours total. I watched a youtube video which was OK but not very thorough. I had only one problem. It was very difficult to get the rotor off as it was rusted to the hub. I whacked it maybe 20 times and then got some wd 40 and let it penetrate and it came off soon after that with just a few whacks. The hub came off pretty quick, as I sprayed it with wd 40 before I started. The car is at 174,000 miles and the pads were still good with little wear.

    It is amazing how quite the car is now.​
     
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  6. retired4999

    retired4999 Prius driver since 2005

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    Just bite the bullet and have a independent shop install them, and be happy you saved $370.
    Go have coffee and be happy! :D
     
  7. spiderman

    spiderman wretched

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    Yeah, but it seems to be a fairly common issue. I am guessing a light weight component not quite up to the task. They are sealed but are bolted on the suspension. You have to replace the whole hub. :( Thanks for the feedback.
     
  8. spiderman

    spiderman wretched

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    While I haven't done the curb thing, every workday I have to run over fairly sharp speed-bumps (rubber) in the parking garage. I hit them < 8mph. I could see that being a possible cause but only if hubs were lame to begin with.
     
  9. spiderman

    spiderman wretched

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    Thanks for pointing that out... I probably wouldn't have noticed that.
     
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  10. spiderman

    spiderman wretched

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    That is what I am hoping for! My dad who can barely hear anyone talk these days (has to wear hearing aids) complains about how loud it is in my prius! LOL
     
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  11. spiderman

    spiderman wretched

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    Well I am not a wealthy retiree like you, I think I better do it myself. :) kidding

    I am just hoping the wheels stay on for a week or so long till I get the hubs!
     
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  12. spiderman

    spiderman wretched

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    I added a link to the original post a short video I took this morning while rotating the wheel. This was mainly for the sound. Hear the clicking when rotating backwards. Gads. Didn't sound like this when I put the summer tires on this spring.
     
    #12 spiderman, Sep 20, 2014
    Last edited: Sep 20, 2014
  13. sfv41901

    sfv41901 Masta S

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    Believe it or not, if u can do lowering springs the rear hubs a relative easy. Its 5 lug nuts, unplug the wheel sensor, unbolted the caliper, remove the rotor & 4 more bolts......then it pops out.

    Just be glad its not a front bearing.....their a lil harder.
     
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  14. css28

    css28 Senior Member

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    Brake work is much more troublesome where they salt the roads, as described earlier.

    The threaded holes however are very worthwhile.

    My point is that I doubt a car in Palmdale develops much chassis component rust.
     
  15. spiderman

    spiderman wretched

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    Can't say I have done springs either. :)

    The hard part, like css28 mentioned, will be the rust and the possibility of an unmovable object.
     
  16. bestmapman

    bestmapman 04, 07 ,08, 09, 10, 16, 21 Prime

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    It is hard to say how loud that is, but mine was similar to that before I changed it out.
     
  17. bestmapman

    bestmapman 04, 07 ,08, 09, 10, 16, 21 Prime

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    Use a lot of wd 40 or penetrating oil and spray both the front and back. Then whack it good and many times. I did not use the threaded holes. Whacking it worked for me.
     
  18. Robert Holt

    Robert Holt Senior Member

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    Good luck, Spider-Man!
    Another cause of wheel bearing failure is lateral G forces from those folks who (ahem!) tend to corner very quickly. Let us know how this comes out as u suspect the bearing is JUST good enough for normal service and folks Like me will also be replacing it early.
     
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  19. sfv41901

    sfv41901 Masta S

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    With or without rust, it's still a relatively easy job. Just requires a rust penatrator (WD40 as mentioned) & a lil more man power.

    They typically salt our roads & the 14 freeway every winter to prevent black ice so I've had my fair share of rusted rotors sticking to the hubs. This is where a good use of anti seize comes in handy
     
  20. spiderman

    spiderman wretched

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    Pretty darn loud... have to crank the stereo and my wife has to yell... err maybe the latter isn't abnormal. :)