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    Howling or whining noise after 30mph only accerlating.. Other issues??

    found the solution... Rear differential - bad pinion bearing figures.. Thank goodness for warranties. Thanks all!
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    Howling or whining noise after 30mph only accerlating.. Other issues??

    Yeah mine is about 4th gear also but seems to have the symtoms through 4th gear. On acceleration i hear the sound.. After i get passed 50mph and it kicks into 5th, no more sound.. This issue should really be addressed. My buddy has a '07 that does it and no mechanic has been able to pin point...
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    Howling or whining noise after 30mph only accerlating.. Other issues??

    Okay i will check into this. I dont really think it is a hiss sound. I want to say it sounds more like differential but after 70k miles. And what makes less sense is that it happens on accel, my old explorer did that when i released the gas and it had a bad diff. Strange issue..
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    Howling or whining noise after 30mph only accerlating.. Other issues??

    Okay I will check for it. Do a few searches. Do you know the specific vacuum line I am looking for? Thank you in advanced for your input.
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    Howling or whining noise after 30mph only accerlating.. Other issues??

    I have a 2008 ford explorer xlt with 70k miles. I have noticed that when im driving, after it kicks into 4th gear or after about 30mph (depending on how hard i am on the gas) i start yo hear a howl/whine noise. I can hear inside the truck. If i let go off the gas, it goes away. If i slightly...
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