intermittent "rotating" noise?
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,817
Likes: 1
From: Hartland WI
intermittent "rotating" noise?
A new trick!
Car was running fine when I came off the expressway and heard a "grinding/creaking noise - sounds like from the rear. Noise stoped when car stopped. Start rolling and at about 10 MPH it starts up again. It is clearly a "rotating" sound. Not a squeal, more of a creak/grinding sound. Over about 30 MPH it seems to go away, but it could just be masked by road sounds.
It is frequent, but intermittent. Stopped completely a while ago for maybe 3-4 miles of city stop and go driving - then started up again.
I don't really notice any difference in handling, but the paranoid part of me says the rear end feels loose or wiggly.
U-joints?
Car was running fine when I came off the expressway and heard a "grinding/creaking noise - sounds like from the rear. Noise stoped when car stopped. Start rolling and at about 10 MPH it starts up again. It is clearly a "rotating" sound. Not a squeal, more of a creak/grinding sound. Over about 30 MPH it seems to go away, but it could just be masked by road sounds.
It is frequent, but intermittent. Stopped completely a while ago for maybe 3-4 miles of city stop and go driving - then started up again.
I don't really notice any difference in handling, but the paranoid part of me says the rear end feels loose or wiggly.
U-joints?
Race Director
Joined: Dec 1999
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From: Almost all Skyline Cruises Vettes at Waterside 1-5
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Originally Posted by rstackjd
A new trick!
Car was running fine when I came off the expressway and heard a "grinding/creaking noise - sounds like from the rear. Noise stoped when car stopped. Start rolling and at about 10 MPH it starts up again. It is clearly a "rotating" sound. Not a squeal, more of a creak/grinding sound. Over about 30 MPH it seems to go away, but it could just be masked by road sounds.
It is frequent, but intermittent. Stopped completely a while ago for maybe 3-4 miles of city stop and go driving - then started up again.
I don't really notice any difference in handling, but the paranoid part of me says the rear end feels loose or wiggly.
U-joints?
Car was running fine when I came off the expressway and heard a "grinding/creaking noise - sounds like from the rear. Noise stoped when car stopped. Start rolling and at about 10 MPH it starts up again. It is clearly a "rotating" sound. Not a squeal, more of a creak/grinding sound. Over about 30 MPH it seems to go away, but it could just be masked by road sounds.
It is frequent, but intermittent. Stopped completely a while ago for maybe 3-4 miles of city stop and go driving - then started up again.
I don't really notice any difference in handling, but the paranoid part of me says the rear end feels loose or wiggly.
U-joints?
Wheel bearings do different noise patterns
seeya
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Jack the rear up (only 1 side) and see if you can rotate the wheel at all in your hands while keeping an eye on the halfshaft. They should turn in unison. Any slippage between when the wheel starts and the halfhaft is u-joints. This isn't a proof positive test, sometimes you won't even see this and they're still gone.
ALSO.....
Put a hand at 12 and 6 o'clock and try to "rock" the wheel. Any movement is wheel bearings.
ALSO.....
Put a hand at 12 and 6 o'clock and try to "rock" the wheel. Any movement is wheel bearings.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,817
Likes: 1
From: Hartland WI
Thanks guys. I did the 12/6 bearing test a few weeks ago when it was up on a lift for the tires - no movement what so ever. The guys at the shop them wanted me out of the way so i never got to really look at the u-joints - but thats certainly what i suspect.
Assuming average to less than average skill and experience - any guesses on how long it might take me to replace them? I'm trying to learn by doing so this is another project I'll tackle myslef.
Assuming average to less than average skill and experience - any guesses on how long it might take me to replace them? I'm trying to learn by doing so this is another project I'll tackle myslef.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
If you have the tools and go slow figure on 6 hours the first time you do it on your own. It gets much much much faster after the first time. This covers the halfshafts.....
http://personal.tmlp.com/scorp/vette/images/ujoints
http://personal.tmlp.com/scorp/vette/images/ujoints
