Rear End Noise
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
Rear End Noise
There's a loud running noise coming from the rear of my car, and the pitch increases with speed. It's also temperature sensitive. I don't hear it on warm days, only when temps are below 50F or so. Don't remember ever hearing u-joints sound like this, but it's also not the high-pitched whine like worn gears make. Any ideas?
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
There's a loud running noise coming from the rear of my car, and the pitch increases with speed. It's also temperature sensitive. I don't hear it on warm days, only when temps are below 50F or so. Don't remember ever hearing u-joints sound like this, but it's also not the high-pitched whine like worn gears make. Any ideas?
Tires can make a lot of noise until they warm up. I run 24/20 psi in my tires and they'll make quite a bit of noise until they are run about 20 to 30 miles. Also the surface of the road can make a big difference in tire noise so take notice of what kind of surface you're driving on.
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
Tires can make a lot of noise until they warm up. I run 24/20 psi in my tires and they'll make quite a bit of noise until they are run about 20 to 30 miles. Also the surface of the road can make a big difference in tire noise so take notice of what kind of surface you're driving on.
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
Yes, I've heard gearsets do that. This is very different sound, more like a roar than a whine. Thinking about what you just said, I don't think the sound changes between acceleration and coast. That probably confirms it's the tires. I'll take her out again today and listen again for that.
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Burning Brakes
Joined: Jan 2012
Posts: 943
Likes: 73
There's a loud running noise coming from the rear of my car, and the pitch increases with speed. It's also temperature sensitive. I don't hear it on warm days, only when temps are below 50F or so. Don't remember ever hearing u-joints sound like this, but it's also not the high-pitched whine like worn gears make. Any ideas?
Last edited by BlackC3vette; Jan 17, 2016 at 09:22 PM.
Drifting
Joined: Aug 2009
Posts: 1,346
Likes: 160
From: new iberia la
"The most common noise produced by tires is tire pattern noise. Pattern noise is what people usually are referring to when talking about tire noise; it occurs because air is trapped in the tread pattern and is suddenly released as the tire rolls along the road surface. Tread elements successively hitting the road surface can create what’s known as a “rhythmic percussion.” Tread designs made up of short, repetitive patterns often generate a whine. Usually, a tire with a rib tread pattern is much quieter than a tire with a lug or block tread pattern"
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Safety Car
Joined: Jan 2009
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From: New York
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
Sounds like a bearing .
http://www.onallcylinders.com/2012/0...veline-noises/
http://www.onallcylinders.com/2012/0...veline-noises/
Noise: Low-pitch rumble at all speeds over 20 miles per hour
Cause: Worn carrier bearings
Yep, that description fits. I'm not sure it would only be audible in colder weather though. Guess I'll have to investigate further...
Thanks for all the ideas!
Last edited by 454Luvr; Jan 20, 2016 at 11:32 AM.