Noise from rear
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,560
Likes: 4
From: Arlington texas
Noise from rear
I noticed last week that I was getting what I call a slight roar coming from the rear of the car. It sounds a lot like when you drive on rough concrete with grooves (not the ones that cross the road, the ones that run in the same direction as the road). I begin to notice it at highway speeds 50-70. It is just slightly louder than my exhaust but has never occurred before. I now get it every time I get on the highway.
I have found things on a whine from the rear being the rear diff. I wouldn't call this a whine but maybe it is.
Nothing has changed on the car and it is driven pretty mildly, no hard accelerations, etc. So it shouldn't be anything that got damaged in the last week or 2. My rear tires are getting to the point that I need to start thinking about replacements but aren't bald by any means.
My first thoughts were that it is coming from one or both tires but the way my luck has been lately I'm beginning to worry that it might be something more and worse.
Anything I should specifically look at as being a known problem with these?
The cars a 2000 FRC all stock with 72,000 miles.
I have found things on a whine from the rear being the rear diff. I wouldn't call this a whine but maybe it is.
Nothing has changed on the car and it is driven pretty mildly, no hard accelerations, etc. So it shouldn't be anything that got damaged in the last week or 2. My rear tires are getting to the point that I need to start thinking about replacements but aren't bald by any means.
My first thoughts were that it is coming from one or both tires but the way my luck has been lately I'm beginning to worry that it might be something more and worse.
Anything I should specifically look at as being a known problem with these?
The cars a 2000 FRC all stock with 72,000 miles.
Racer
Joined: Mar 2005
Posts: 399
Likes: 2
From: Newtown PA
My 02 Z06 has about 28K and last November I took it to the dragstrip and made 3 runs (for total to date of about 30 runs). As I was driving home, I noticed that my diff would whine between 45-60. The whine only occurs upon float when feathering the throttle. When I accelerate the whine goes away and when I let off the throttle the whine goes away. When the diff is cold, the whine goes away but after a few miles when the diff warms up, the whine comes back.
My original F1 Supercar tires made a loud roaring sound on the highway (as you describe) after about 5-6K miles. When I replaced them with Vredesteins, the car seemed to be quieter than when new. I think a wheel bearing sounds more like a low pitch grinding-like sound that gets louder with speed.
My original F1 Supercar tires made a loud roaring sound on the highway (as you describe) after about 5-6K miles. When I replaced them with Vredesteins, the car seemed to be quieter than when new. I think a wheel bearing sounds more like a low pitch grinding-like sound that gets louder with speed.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,560
Likes: 4
From: Arlington texas
ouch on the price for bearings.
The noise I am hearing doesn't change with acceleration. The faster I go the louder it gets but it isn't all that loud. Can just hear it over the muffler because it is something different than what I am used to. I can let off the accelerator and even turn off the ignition and hear it lower as my speed decreases. It seems to disappear above 75 mph.
I've had it maybe 2 1/2 years and have never heard the tires doing this so I was leaning towards bearings initially.
Just priced bearings at auto parts store. $199-239 depending on brand. I guess the good news is that I can install the assembly myself and save the labor portion. Now I just need to figure out if this is what it is. Guess it'll be going up on some jack stands this weekend. I'll be able to pinpoint where the noise is coming from that way atleast.
The noise I am hearing doesn't change with acceleration. The faster I go the louder it gets but it isn't all that loud. Can just hear it over the muffler because it is something different than what I am used to. I can let off the accelerator and even turn off the ignition and hear it lower as my speed decreases. It seems to disappear above 75 mph.
I've had it maybe 2 1/2 years and have never heard the tires doing this so I was leaning towards bearings initially.
Just priced bearings at auto parts store. $199-239 depending on brand. I guess the good news is that I can install the assembly myself and save the labor portion. Now I just need to figure out if this is what it is. Guess it'll be going up on some jack stands this weekend. I'll be able to pinpoint where the noise is coming from that way atleast.
Last edited by milo30; Jun 23, 2010 at 11:51 PM. Reason: more
