问：有节奏的mo吟噪声从〜30英里 /小时开始，随着速度的增加，强度的增长 - 可能是什么？
Hey, I'm looking at possibly buying a car (the one I entered information for) from my friend. It's been used VERY lightly in the past year (which is kind of concerning). In fact, I have a pre-purchase inspection scheduled with YourMechanic for 12pm tomorrow (Wednesday, 11/8/2016) with Edgar (Repair Order #1430419).
The main thing I'm worried about is this noise. It's a... rhythmic moaning noise that starts at around 30mph and grows in frequency and intensity as I go faster speeds. It sounds like "wah-wah-wah-wah" if that makes sense. It's nonexistent if I'm not moving but revving the engine - which makes me think it's got something to do with the wheel system or transmission.
无论如何，我都不知道会是什么，并且认为我可以收集一些信息，并给大家提供一些信息，以防您明天需要为预约带来额外的工具。
My car has 160000 miles.
我的汽车有自动变速箱。
推荐服务manbetx体育手机
| 轮轴承更换 | $ 110.89- $ 591.42 | Get a Quote |
嘿。这是一个常见的迹象车轮轴承故障（S）. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface of the rollers and the race is precision machined to tight tolerances and highly polished to allow the rollers to pass easily over the race with the addition of bearing grease for lubrication and cooling.
Over time the bearings will wear slightly, allowing microscopic pieces of metal into the grease. Bearing noise can sound a lot like a brake pad dragging or grinding. It can also sound like whirring, whining or humming depending on how much sound deadening material your vehicle has in it.
轴承噪声将始终取决于车速的含义，即加快噪音或减速噪音应改变频率或响度。转弯可能会影响损坏的前轮轴承的噪音，并且在转弯时通常会更明显。我建议有专业人士check the wheel bearings亲自确定他们是否需要维修。
立即为您的汽车报价
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing