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2007 Explorer humming noise

Discussion in 'Stock 2006 -2010 Explorers' started by ryanb99, January 12, 2018.

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    1. ryanb99

      ryanb99 New Member

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      Hi forum. I am having an aggravating issue with my wife's Explorer and looking for some advice. It is a 2007 V6 2WD. It has had a humming issue for a few months now. It gets louder with speed, but is not affected at all during turning to point to a certain side. There is also a very slight vibration you wouldn't notice if you didn't drive it daily. Also feels to me like the vehicle speed is being dragged down slightly faster than normal when foot is off the gas. No play at all when jacked up shaking wheel on any of the four wheels. It was time for tires anyway so I put a new set on and had alignment done last week. No change. I'm still almost certain it is one of the front bearings, bit I can't think of anything else to try to isolate it. At 150k miles it's probably not a bad idea to change out both front hub assemblies, but just wanted to reach out beforehand in case I am missing another possible source of this.
       
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    3. Explorer_PL

      Explorer_PL Elite Explorer

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      It can be a rear bearing as well. On mine, I have been convinced numerous time that my front hubs are bad, and it would turn out that it was the rear.
      It can be also one of the driveshaft u-joints, usually the front u-joint on the front one (scratch that, you have 2WD).

      What I do, I put it up on 4 jacks and put it in gear and listen to all 4 corners (again, with 2 WD it may be a little more complicated), but you get the idea.

      I use a long screwdriver/pry bar and usually you can isolate the bad bearing.
       
    4. 07EddyB

      07EddyB Active Member

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      What PL said - you CAN get a vibration in the steering wheel with a rear bearing. In fact, it can get really bad. They also don't give you the turning clues that the front bearings do until they get really really bad. I replaced my right rear bearing once because I was getting noise as well as some seriously worrying vibration in my steering wheel. My front bearings had been replaced - the rears had not and I couldn't pin the vibration or the noise to either side. Finally, the right side starting making slightly more noise in a turn. But the right front was the last one I replaced! So since I was at about 100K anyway I took a chance on the RR.

      I chose wisely.

      Of course, it may be humming just because it doesn't know the words?

      Seriously folks - I'm here all night. Don't forget to tip your moderator!
       
    5. ryanb99

      ryanb99 New Member

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      Thanks for the info. I only suspect the front due to it certainly sounding like the front, but it could still be from the rear. It's honestly probably time to change them all four soon anyway, but I'd like to get rid of the problem initially by doing the front or rears first if I don't do them all at once.

      I will jack it up and try to eliminate the rears as the problem at least.
       
    6. GeorgeH

      GeorgeH New Member

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      Does anyone know if cold weather affect bearing as they start to go bad. I.e., will the noise/vibrations be worse on cold days?
       
    7. Explorer_PL

      Explorer_PL Elite Explorer

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      Not really, I do not thing the temperature would affect it much. After a quarter mile they are warmed up anyway.
       
    8. Tech By Trade

      Tech By Trade Well-Known Member

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      Yes, if you are talking a 20 degree change. When mine were bad in the winter at -20c they would click like a bugger, but once they warmed up they would only rattle when turning away from the bad bearing.
       

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