Rear End Noise
Thread Starter
Burning Brakes
Joined: Aug 2006
Posts: 1,058
Likes: 27
From: Eastern North Carolina
Rear End Noise
I am trying to isolate a noise that is coming from either the rear bearings or Diff. I would like to run the car with the rear end up in the air, (tires off the ground). Can you do this with a Corvette? Thanks 
Thread Starter
Burning Brakes
Joined: Aug 2006
Posts: 1,058
Likes: 27
From: Eastern North Carolina
Thanks Guys, Its kind of a grinding noise or whirling noise. I only hear it at very low speeds. The noise speeds up and slows down in relationship to how fast the car is rolling. Sometimes I don't hear it at all. I never hear it when the radio is turned up. 
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Something else to consider is an additive made by GM, for the diff. They sell it at parts counters at GM service centers.
Safety Car
Joined: Nov 2004
Posts: 4,359
Likes: 57
From: Mundelein Illinois
In my opinion, I am thinking rear diff. I would change rear end fluid and try that. Make sure you add the GM additive. If it was trailering arms, I would think you'd here it all the time.
Le Mans Master
Joined: Nov 2001
Posts: 8,726
Likes: 1,900
From: LONG ISLAND
2025 C3 ('68-'73) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
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I had the same noise, rear diff / posi fluid broke down, emptied it out & refilled it, did lots of figure 8's afterwards & it cured the noises, alo had to change out my rear end carrier mount bushing, it was wasted !!!
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2nd Gear
Joined: Mar 2007
Posts: 2
Likes: 0
From: Virginia Beach Viriginia
Grinding noise 2006 corvette
I just took my 2006 vette into the dealership for a 10000 mile check up. I told them about a grinding noise from the rear end. I was told that the fluid GM put in is breaking down and that it needs to be flushed and a synthetic fluid added. The kicker is that even though vetts are showing up with this problem they are not covering it under the warranty. I'm fighting this one big time as I don't think I should have to pay 130 bucks or do work myself when GM knows of the problem.
Drifting
Joined: Jul 2007
Posts: 1,712
Likes: 0
From: Tampa FL
I just took my 2006 vette into the dealership for a 10000 mile check up. I told them about a grinding noise from the rear end. I was told that the fluid GM put in is breaking down and that it needs to be flushed and a synthetic fluid added. The kicker is that even though vetts are showing up with this problem they are not covering it under the warranty. I'm fighting this one big time as I don't think I should have to pay 130 bucks or do work myself when GM knows of the problem.
2nd Gear
Joined: Mar 2007
Posts: 2
Likes: 0
From: Virginia Beach Viriginia
Sorry, came in the middle of conversation and I'm dealing with an issue with the 06 and noise. Got bigger issues now, my wife hit a deer last night with the 06 on the highway (3 hours away from here), bent up the license plate and hit the hood, windshield, roof, back and side, blood, fur and scratches every where. She drove it away and now I have to get a new paint job (thank god for insurance).
Racer
Joined: Apr 2006
Posts: 370
Likes: 0
From: Peterborough Ontario
Le Mans Master
Joined: Sep 2002
Posts: 6,689
Likes: 0
From: Michigan
St. Jude Donor '15
My rear end was noisy when I bought the car. I had my mechanic drain, inspect, and refill the diff with Schaeffer's 267 which quieted things down.
http://www.schaefferoil.com/gear_oils/267.html
http://www.schaefferoil.com/gear_oils/267.html
