Hello all,
I just got my 2007 Z51 with 11k miles. Everytime I turn left or right all the way, I hear a griding noise. It bothers me of course, and still under warranty. any advice or reasons why things are like that.
Thanks.

 

Noise from the front? You're probably just experiencing the unnerving sounds of very wide tires scuffing in tight low-speed turns. This is normal. Discussed on many threads, like this one:
http://forums.corvetteforum.com/c6-c...ght-turns.html

Noise from the rear:
http://forums.corvetteforum.com/c6-c...en-i-turn.html

Other possibilities:
http://forums.corvetteforum.com/c6-c...-steering.html

And congrats on your new C6!

 

Actually I have been hearing a noise too - though more like a creaking noise, noticed it around 15k miles. I think it's from the rear though, and seems to only happen when I make fast, tight turns (like the u-turn by my house, but not in a grocery store parking lot).

 

rear end chatter = change gear oil...I did this yesterday...no chatter

I too, have noticed on occasion the front end...researching that as well...
the front end "feels" like I am going over a bump or possibly the tires scrubbing as noted in the posted thread
could even compare it to a 4x4 turning hard....and the "feel" that has...

but like I said...very rare...and I will check the lug nut torque and some other ideas...

 

Got same problem with 09 c6 .. front tires noise when making turns in very low speed ..

I think its the wide tire scrubbing with something else in the body .. guess its normal ..

 

Take it back ASAP.

 

Lightfoots got it. The first two are the first things to look at.

 

I had noise in the rear differential on sharp slow-speed turns, especially first thing in the morning. The TSB below solved the problem.

TSB for Rear Differential Chatter:

Document ID# 2048181
2005 - 2008 Chevrolet Corvette

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Subject: Rear Axle Clunk and/or Chatter Type Noise on Turns (Drain/Refill Rear Differential Fluid) #07-04-20-002A - (01/09/2008)


Models: 2004-2008 Cadillac XLR (Including V-Series and Export)

2005-2008 Chevrolet Corvette (Including Z06 and Export)


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This bulletin is being revised to change the fluid recommendation and to remove the requirement of adding friction modifier. Please discard Corporate Bulletin Number 07-04-20-002 (Section 04 -- Driveline/Axle).


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Condition
Some customers may comment on a clunk and/or chatter type noise from the rear of the vehicle while making turns.

Cause
This condition may be caused by slip/stick of the posi-traction clutch plates due to insufficient limited-slip axle additive. As plates slip and stick, a jumping or jerking feel occurs accompanied by a clunk noise.

Correction
Important: DO NOT remove the differential cover from the rear or the two sides. It is not necessary to flush the old fluid from the differential.

Drain and refill the rear differential fluid using the procedure listed below.

Draining Procedure:

Raise and support the vehicle.
Clean any dirt from around the differential drain plug.
If not equipped with a differential cooler, remove the drain plug (1) and washer (2) from the differential.


If equipped with a differential cooler:
4.1. Using a bent tip screwdriver, remove the quick connect fitting retaining ring (3) from the quick connect fitting (4) and discard the retaining ring.

4.2. Remove the differential cooler inlet pipe from the differential nut.

Drain the fluid.
Filling Procedure


If not equipped with a differential cooler, install the drain plug (1) and washer (2) to the differential.
Tighten
Tighten the differential drain plug to 35 N•m (26 lb ft).


If equipped with a differential cooler:
2.1. Install a new retaining ring.

2.2. Connect the differential cooler pump inlet pipe (2) to the differential. A distinct snap should be heard or felt when assembling the cooler pipe to the fitting.

2.3. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

Clean any dirt from around the differential fill plug.
Remove the fill plug and washer from the differential.
Important: DO NOT add any limited-slip additive (friction modifier). With this new fluid (Dexron LS Gear Oil 75W-90) it is no longer required to add friction modifier. If friction modifier is added, it will cause the fluid to lose some of it's friction reducing properties as well as reducing seal life.

Fill the differential with the new DEXRON® LS gear oil, P/N 88862624 (Canadian P/N 88862625). Refer to the table listed below for lubrication specifications.
Check the fluid level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
Install the fill plug and washer to the differential.
Tighten
Tighten the differential fill plug to 35 N•m (26 lb ft).

Important: Steps 8-13 are for vehicles equipped with the differential cooling system. For vehicles not equipped with the cooling system, proceed to step 14.

Raise the vehicle so the wheels are about a foot off the floor. Make sure the wheels can spin freely without obstruction from the hoist or any nearby items.
Start the vehicle and put the transmission in second gear. Slowly accelerate to 10 mph and hold this speed for one minute.
Turn the vehicle off .
Raise the vehicle.
Check the fluid level in the differential. Add fluid until the recommended level is reached.
Lower the vehicle.
Once the differential fluid has been changed, the vehicle must be driven in 8-10 tight figure eight maneuvers to heat the fluid and allow the fluid to be worked into the clutch plates.
Lubrication Specifications Application
Quantity

Metric
English

2004-2005 XLR (Including Export) and 2005 Corvette (Non Export)
1.72 liters
1.85 quarts

2006-2008 XLR (Including V-Series and Export) and 2006-2008 Corvette (Non Z06)(Non Export)
2.0 liters
2.11 quarts

2005 Corvette Export
1.88 liters
1.99 quarts

2006-2008 Corvette Export (Non Z06)
2.16 liters
2.28 quarts

2006-2008 Corvette Z06
2.75 liters
2.91 quarts


Parts Information
Part Number
Description

88862624 (US-1 Quart)

88862625 (Canada-1 Liter)
DEXRON® LS Gear Oil


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

F9709*
Drain & Refill Rear Axle Fluid
0.6 hr

* This is a unique labor operation number for bulletin use only. It will not be published in the Labor Time Guide.


GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.


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Document ID# 2048181
2005 Chevrolet Corvette

 

recently purchased a 06 convertible and am getting the noises mentioned in the forum. Is this remedy at dealer cost? i have no warranty on this vehicle. thanks in advance..tom

 

It's not a problem, they aren't scrubbing anything on the car, they are literally sliding across the ground.

 

nope... if you're out of warranty, you're out of luck with the dealer. it is an easy fix though... alot of write-ups on it here

 

thanks for your response back to me. to elaborate a little more about my problem. i can now see what the scrubbing might feel like..almost like a sharp turn on a hard surface with a 4wd engaged. however, i sometime think i can feel something thru the shifter. i did see alot of talk about the incorrect differential lube and how changing this might help. so my secoond question is..

consumer is probably responsible for costs on a service bulletin while the dealer would be responsible for a recall. is that correct?

i am the second owner and warranty is gone..

thanks again. tom

 

this

 

Just Wed. I made an appt. at the dealer to look into a "similar" problem. The OP did not specify whether it is a metallic grinding or not. Mine 'sounds' like it is more metallic. BTW: '07 w/ 10K miles