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Thread: Whining noise when I accelerate

  1. #21

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    So if I replace the carrier bearings, will the whine go away?

  2. #22
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    If you put the window down, does it sound like its coming from the front left tire area?.

    There were a couple posts about two or three months back where the noise would start around 20mph and go up to about 50mph.. over 50 it was not noticeable.

    Anyway- it turned out to be the front spindle was slightly loose. Tighten the spindle, noise went away. It noise sounded just like you are describing it to be.
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  3. #23
    Registered Billy Ray's Avatar
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    Bad fan belts can make sounds like that or a good belt that is too loose (bad tensioner).

    Check the inside of the belt and how much you can deflect it.
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  4. #24

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    I have changed out both front hubs, new cross drilled and slotted brakes all around, fluid changes in both front and rear diffs, and fluid changed on tranny.

  5. #25
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    ... I assume it is still making the whining noise?

    put your window down when driving, listen to try to pinpoint if it is coming from the front tire area. If it does sound like it is coming from the tire well, pull the tire off and check the spindle and see if its slightly loose.
    The Pennsylvania State University
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  6. #26
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    I had the same problem with my front diff when I accelerated. It was the pinion bearing. I have plans on rebuilding the front diff at a later time but for myself it was cheaper and faster for me to do a temporary axles swap. Reason why i say axles is I replaced both front and rear do to a different gear ratio from a 6 cylinder model. I know the rear is a weaker axle but as I said it is temporary.

    I would recommend you find a shop that specializes in rebuilding differentials and know up front what it is going to cost. My reason why I swapped out the axles is the one mechanic I took my WJ to ripped me off, told me it would take 10 hours to repair and then after 5 hours called me up stating he had issues and it was going to take about 35 hours. To me he tried to take me for a ride thinking I wouldn't tell him to slap the wheels back on it and drive off. Fooled him.4

    Anyway, hope you have better luck than I did.
    1999 Jeep Grand Cherokee Limited 4.7L (POS)

  7. #27
    Patriot Guard Riders Drem's Avatar
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    If you have access to a lift get it up in the air and run it. Easiest way to find drive train noises.

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  8. #28

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    I had this problem and replaced both hubs and cv halfshafts and now no more noise. Yayyyyy

  9. #29

    Icon922

    I'm going to inspect my carrier bearings this weekend. I will also inspect the Accessory Belt Pulley and the Idle Belt Tensioner. Hopefully I find the root of the damn problem.

    Ohh, I can feel the vibration through the front of my WJ. When the noise is going on, its not only loud (getting louder with more speed), but it's also felt through the front cab of my Jeep.

  10. #30

    Icon922

    So I checked both my accessory and idle pulleys. Those are in good condition and no problems.

    Outside of checking my carrier bearings, front diff, and spindles, can anyone else think of something I might be missing?

  11. #31

    Default same whining noise

    I have a 2007 Jeep Commander and it started making the same whining noise 2 days ago. It sounds like it is coming from the front and only happens when I accelerate. I can put it in park and rev the engine and still hear the noise, not instantly, but after a few seconds of pushing on the gas pedal. What could this be?? I am hoping nothing major! I am a woman and nervous about taking it in somewhere before I figure out a few things that it could be...I have learned my lesson before and they always tell me that things are wrong when they are not. Thanks!

  12. #32
    Registered xJoshxx's Avatar
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    Quote Originally Posted by Drem View Post
    If you have access to a lift get it up in the air and run it. Easiest way to find drive train noises.
    x2 or 4 jacks stands lol

  13. #33

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    Quote Originally Posted by Pogster View Post
    Gets louder with vehicle speed

    No, I can rev the motor in P and never hear it.

    Yes, when my WJ is moving, that's when I hear the noise. The noise gets higher pitched and louder, the faster I go. If, I put my WJ in N at say 60, the noise is still there.

    If tied to engine speed only, it's probably a pulley or?

    If tied to vehicle speed it's the front diff, CV joints, or?
    It's not a pulley or anything on the engine.

    It has to be in the running gear.

    CV joint, front differential, driveshaft???
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  14. #34

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    I think I am having this issue as well, has anyone resolved it?

  15. #35
    the logical one fixer5000's Avatar
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    how about check the fluid in the differential??? holy older post lol
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  16. #36
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    I seriously have the same exact problem! Its annoying... my sister likes it cause it puts the babies to sleep and my friend says she feels like shes on a plane cause it sounds as if you were up at 35k feet up in the air. If im on the fwy and i have my foot on gas.... its there and the pitch gets higher the faster i go.. if i let go.. the sound goes away.. then i step on gas again and the sound continues. (im hearing it as i type this omg lol ) Idk what it is.... help pwwweease! has anyone solved the issue?
    oh and i just had the differentals fluids changed a couple days ago.
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  17. #37
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    I had a similar noise, it turned out to be the T Case front output bearing. The sound actually came from the slinger on the drive shaft yoke scraping on the casing because of the play in the bearing. Take off your front drive shaft and see if the noise will stop. To replace the bearing the T Case needs to be split and the input shaft removed. I replaced both front and rear seals while I was at it. It can be done with the T Case on the Jeep but I pulled mine.
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  18. #38
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    If your wj is a 99-01 with the 4.0, there is a tsb for front axle whine. It involves installing a new driveshaft and front yoke. TSB NUMBER: 03-001-01 REV. A

    You may also wish to spray lube the crap out of the cv joint on the driveshaft (I am assuming that the wj's have them). Then roadtest it to see if the noise goes away. The cv joint have a tendancy to dry out and cause a very loud squealing noise. We call it "angry sparrows" on the TJ board.
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