Noise from the rear - ZR-1 Net Registry Forums

SharkPilot · 08-15-2009

Yesterday on the way to work I started hearing a scraping noise from the rear. It had the same rythem as the wheel speed and almost sounded like something was caught up in there and rubbing against the tire. I heard it a couple of times and then it was quiet. Seven miles later after exiting the freeway it was back a couple more times.
On the way home it did it again and there was also a "clink" sound when I started moving. When I was close to home I opened the left side window and could plainly hear it on the outside too.
There was one intreresting clue... While it was making the noise on the freeway (about 35mph) I ran over a small road joint and the noise instantly stopped.
This morning I turned the car around to back it into the garage. Each time I changed direction I could hear that "clink" sound.
Pulled off the left rear wheel and found nothing unusual. I was thinking the hub bearing would be noticably loose or perhaps the axle shaft u-joints but they all look okay. The right side doesn't look any different. Both rear wheel bearings have similar play and I can't feel or see any movement in the u-joints. I have not looked at the driveshaft but this sounded like it was connected with wheel speed.
Oh, and the car has 40,000 miles on it.
You guys have seen (heard?) bearing failures before. Is that what this sounds like? I'm kind of puzzled since there is no smoking gun under there but I'm new to C4's so there is still a lot to learn.

As always, thanks for the help. SharkPilot.

08-15-2009	#1
SharkPilot Join Date: Aug 2005 Location: Anaheim, California Posts: 105	Noise from the rear Yesterday on the way to work I started hearing a scraping noise from the rear. It had the same rythem as the wheel speed and almost sounded like something was caught up in there and rubbing against the tire. I heard it a couple of times and then it was quiet. Seven miles later after exiting the freeway it was back a couple more times. On the way home it did it again and there was also a "clink" sound when I started moving. When I was close to home I opened the left side window and could plainly hear it on the outside too. There was one intreresting clue... While it was making the noise on the freeway (about 35mph) I ran over a small road joint and the noise instantly stopped. This morning I turned the car around to back it into the garage. Each time I changed direction I could hear that "clink" sound. Pulled off the left rear wheel and found nothing unusual. I was thinking the hub bearing would be noticably loose or perhaps the axle shaft u-joints but they all look okay. The right side doesn't look any different. Both rear wheel bearings have similar play and I can't feel or see any movement in the u-joints. I have not looked at the driveshaft but this sounded like it was connected with wheel speed. Oh, and the car has 40,000 miles on it. You guys have seen (heard?) bearing failures before. Is that what this sounds like? I'm kind of puzzled since there is no smoking gun under there but I'm new to C4's so there is still a lot to learn. As always, thanks for the help. SharkPilot.