My girlfriend's Daewoo Lanos has a rumbling that is steadily getting louder (now VERY loud). Her mechanic says its the transmission. To me it sounds like wheel bearings: it always gets much louder when you turn away from the wheel in question; it doesn't change in pitch or loudness whether in neutral, coasting, or under load, or even when the ignition is off.
Could a transmission noise get louder like that when you turn the steering wheel? Also, could this be CV joints? Thanks for any help!
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Re: Is this rumbling wheel bearings or transmission?
If the sound is all the time, no matter what you are doing then it is the Transmission going bad. CV Joints, Wheel bearing will only make the noise when in rotation.. Also remember that this is a front wheel drive car, so it will throw you off thinking it is the wheel bearings or CV joints due to the front wheel drive
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The symptoms match those of wheel bearings getting worn out. One sure way to determine it is not coming from the transmission is by taking the vehicle to a decent speed, say 35 MPH ,and put it in neutral. If the humming continues unchanged, then it comes from bearings, and if it drops, then it might come from transmission or engine. 135000 miles is way over the life expectancy of a set of bearings. If the bearings are starting to fail, they produce a high pitch sound, almost a whistle, and if they are almost gone, they produce a deep rumble. High speed turns might subdue the sound, or make it worse, depending on if you take weight of bearings, or increase it.
driveline noise could be caused by worn or perished tyres(rumble),worn wheel bearing(rumble),worn brakes(scraping or squealing),worn gearbox bearings.I hope this helps,or get back to me with some more detail to your report.Dont forget to rate this help suggestion
If your noise is a low pitch rumble that gets louder the faster you go, it likely is a wheel bearing that is the cause. Another sign that the noise is from a wheel bearing is if the noise tends to get louder when steering one direction at a steady speed, and quieter when steering the other direction. A transmission noise does not change with the steering.