rear end noise?

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Thread: rear end noise?

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    Default rear end noise?

    Has anybody experienced a kind of wop, wop, wop noise from the rear end? It starts around 30mph and doesnt change while accelerating or decelerating. It doesnt change in neutral or while applying the brakes.

    2002 AC with 265/70/18s

    Thanks for any feedback...

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    Supporter Remmy700P's Avatar
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    Default Re: rear end noise?

    Tires.
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    Default Re: rear end noise?

    Nope...I have replaced my tires about 15k miles ago and still have the noise...I have rotated the tires several times and again..I still have the noise.

    Could it be the rear wheel bearings?

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    Default Re: rear end noise?

    It could be a bearing. It could be a bent rear drum backing plate rubbing. Hard to tell over the interweb you know?!??
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    Default Re: rear end noise?

    Is it a wop wop wop or a woom woom woom? The later could be a rear end going out.
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    Default Re: rear end noise?

    Quote Originally Posted by Remmy700P View Post
    It could be a bearing. It could be a bent rear drum backing plate rubbing. Hard to tell over the interweb you know?!??
    Sign me up for a bearing. Jack the rear tires off the ground and see if you can find any movement/looseness when wiggling the wheel. Slip the transmission into neutral and rotate the wheels. Look for anything rough or gravely and listen for any noise that's out of the ordinary. Even if you don't find anything loose it still could be the wheel bearing. Just my two cents worth.
    Last edited by Jonesy; 08-01-2012 at 04:06 PM.
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    Default Re: rear end noise?

    yea but when a bearing goes bad it usually gets louder the faster it rotates. the way the OP stated it, the noise is the same after 30 MPH.
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    Default Re: rear end noise?

    your right highwaylizard it is more of a woom, woom.. if its the rear end will I see shavings or anything?
    @ Tundra 3400 the noise picks up with speed to a point, but ya, not until 30 or so

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    Default Re: rear end noise?

    Quote Originally Posted by pvpct View Post
    your right highwaylizard it is more of a woom, woom.. if its the rear end will I see shavings or anything?
    @ Tundra 3400 the noise picks up with speed to a point, but ya, not until 30 or so
    oh ok yea you didnt mention that in the OP. i would say that its a bearing then.
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    Default Re: rear end noise?

    Do a shot drain of the differential oil. Clean the area around the fill bolt and loosen it. Remove it and using a clean Styrofoam cup, run a shot of differential oil into the cup and then put the plug back in. If it is silvery or has flakes in it then you know the rest of the sad story.
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    Default Re: rear end noise?

    X2 on a bearing, although I wouldn't rule out a bent axle shaft. Is your truck always empty? Does the noise change if you are carrying a load?
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    Default Re: rear end noise?

    Have same noise as OP with my 06 had it for a long time, got truck with 39k on it now have 72k still makes same noise. Drives me crazy. Replaced a wheel bearing nothing changed. Thinking it is carrier bearing or maybe rear lsd / carrier.
    Let me know if you fixed the problem.

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    Default Re: rear end noise?

    Here is how I normally check for rear noise. Jack up rear wheel put jack stand on both sides. Put it in drive let it spin the wheel you can probably here where is that noise coming from

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    Default Re: rear end noise?

    If it's more of a whhhoooof noise I'd say watch what you eat.


    The rear end could be going out, mine made a similar noise for over a year and eventually it got louder/more pronounced. It eventually got to a point where when I decelerated it made a whirring noise and sometimes a noise that sounded like I had empty cans bouncing around in my bed. Even more eventually, my rear end locked up a few times while driving from a stop... yikes. I put the rear axle up on jack stands, put blocks in front of the front tires, put it in drive and went behind to listen. I was angry to hear the thump thump thump of my blown out rear end, but it had to go sometime. There is a pin in the carrier that came out, wedging itself between ring and pinion, it destroyed everything.
    Good luck.
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    Default Re: rear end noise?

    I have a "whoom whoom whoom" at speed, but haven't figured out if it's my new tires or my rear end yet. My diff fluid is pretty metallic for having changed it only 15k miles ago, but not any more metallic than what a regular oil change looks like. It was super nasty when I did change it though. Probably the first change it ever had, around 85k miles.
    What kind of life span (in miles) does a rear end have once it starts making noise?
    tundrunk, I remember reading a while back about your dilemma, but can't remember the details. What kind of price am I looking at if my rear end eventually goes out?
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