Scraping Noise
Thread Starter
Racer
Joined: Dec 2004
Posts: 306
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From: Naples FL
Scraping Noise
So i was going to take me Vette out for run up to a super bowl party in the Poconos yesterday. Well when i started the car up I got a loud scraping noise coming from what seems like the transmission. Once i took the car out of park and starting rolling the sound went away. I then parked the car and restarted it, the scraping came back. Once again i put the car in drive and it went away after rolling about ten feet. Anybody have nay guess to what this is. I didn't want to chance anything so i didn't drive the car. I did have the tranny rebuilt last year so I hoping nothing went bad with that. Any help would be great.
Thanks
Tony
Thanks
Tony
Instructor
Joined: Nov 2003
Posts: 199
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From: Huntsville AL
So i was going to take me Vette out for run up to a super bowl party in the Poconos yesterday. Well when i started the car up I got a loud scraping noise coming from what seems like the transmission. Once i took the car out of park and starting rolling the sound went away. I then parked the car and restarted it, the scraping came back. Once again i put the car in drive and it went away after rolling about ten feet. Anybody have nay guess to what this is. I didn't want to chance anything so i didn't drive the car. I did have the tranny rebuilt last year so I hoping nothing went bad with that. Any help would be great.
Thanks
Tony
Thanks
Tony
Thread Starter
Racer
Joined: Dec 2004
Posts: 306
Likes: 0
From: Naples FL
Instructor
Joined: Nov 2003
Posts: 199
Likes: 0
From: Huntsville AL
with the U-joints going, the sound does go away after you start rolling.... in fact if you don't accelerate hard or launch hard initially you might not hear any noise... however if you launch the car hard from a standing stop and you get the scraping sounds, I suspect its the joints...
Burning Brakes
Joined: Jan 2007
Posts: 921
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From: Houston TX
with the U-joints going, the sound does go away after you start rolling.... in fact if you don't accelerate hard or launch hard initially you might not hear any noise... however if you launch the car hard from a standing stop and you get the scraping sounds, I suspect its the joints...
Instructor
Joined: Nov 2003
Posts: 199
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From: Huntsville AL
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Once i took the car out of park and starting rolling the sound went away
I did have the tranny rebuilt last year
I did have the tranny rebuilt last year
Its free to jack up the car at home and inspect, grab, and shake those components...
If nothing is found like that; grab a socket(s), extension, and ratchet and make sure all the bolts are tight on the inspection plate, bell-housing, and other tranny components while the engine is NOT running.
THEN
If nothing is found like that...and...If you are experienced enough:
make sure you have the car properly lifted and secured on jack-stands, wheels chocked, e-brake on and start the car in park...see if you can pin-point the noise and go from there.
If you arent that familiar with the above, have a friend that is experienced come help, maybe bring it to a local mechanic or friend with a lift to pin-point the noise...
or...
if after having it on jack-stands and nothing is found, call and ask the tranny shop that built it to send a tech to try and diagnose it at your house before putting it on the wrecker...most tranny shops have wreckers to bring cars in. Most around here will send an apprentice tech to diagnose the prob before actually taking the car back to the shop.
G/L
Jim
Racer
Joined: Oct 2006
Posts: 444
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From: Dardenne Prairie Mo
My 89 had a scraping sound coming from the left rear. I had to take it in for a inspection and the told me the rear wheel bearing was bad. I replaced both rears. When I first heard that sound I suspected a wheel bearing....not a u-joint, I always thought a bad u-joint made a clunking sound.....or is that only with a auto tranny?
Burning Brakes
Joined: Jan 2007
Posts: 921
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From: Houston TX
That would be easy to check. Just engage the starter again briefly after it has started and listen (note-that is hard on the starter drive and ring gear).
Racer
Joined: Nov 2007
Posts: 449
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From: Warren, Michigan
doesn't sound to be a rotational noise from the u-joints since he is not moving the car. like others have said, it sounds like something in the area of the flywheel/inspection plate. I have seen rust built up on the flywheel on cars that sit more than driven. a quick inspection with the car running and inspection plate off might give you a clue. it might not even have to be running.
P.S. check also your flywheel bolts since you said you had your tranny worked on recently. putting a load on the tranny will make the noise go away if those are not torqued all the way.
P.S. check also your flywheel bolts since you said you had your tranny worked on recently. putting a load on the tranny will make the noise go away if those are not torqued all the way.
Last edited by Harryscarlot; Feb 4, 2008 at 09:13 PM.
Racer
Joined: Nov 2007
Posts: 449
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From: Warren, Michigan
