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Old 10-29-2012, 08:47 PM   #1
Modern07
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Groan/Grind Noise when turning slowly

So over the last week or so I've noticed a groaning/grinding noise coming from the rear when I'm driving forwards and turning slowly...it's possibly there all the time, but drowned out by the engine/exhaust at higher speeds so I don't notice it.

Anyone else had this issue, or got any ideas what it might be?

700 Miles on it so far

Couple this with the MyLink issue and it looks like a trip to the dealer is needed :(
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Old 10-29-2012, 09:23 PM   #2
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I just noticed mine doing this after a left turn. Pulled the parking brake and it changed the sound so I'm thinking its in the brakes.

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Old 10-30-2012, 07:04 AM   #3
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Several people seem to be having this issue. Find a empty parking lot and do several slow figure 8's.If the noise stops its probably your rear diff making noise. If thats the problem your dealer will change out your diff fluid and possibly add some friction mod. or LS add. The tech at my dealership said that if they do this they are required to do the figure 8's after they finish.
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Old 10-30-2012, 05:00 PM   #4
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My car had it too. You need the rear fluid changed as its the posi unit making the groan. If you do it yourself use extra additive than just what is in the fluid
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Old 10-30-2012, 06:46 PM   #5
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The cold weather will make this problem more prevalent (as we have noticed with all the recent complaints), it is most likely coming from the rear diff, I have the same problem and just popped up with colder weather. Need to swap the fluid or add some additive.
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Old 10-30-2012, 06:59 PM   #6
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it's the heat soak.
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Couple months ago we a few of us were at the track playing with one of my buddies 2010 Z06 automatic.Between 4 of us NO ONE was able to get out of the 12's.

I believe torque managnent was killing us that night, when launching the car would take off and fall flat on it's face.
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Old 11-01-2012, 07:27 AM   #7
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Quote:
Originally Posted by Modern07 View Post
So over the last week or so I've noticed a groaning/grinding noise coming from the rear when I'm driving forwards and turning slowly...it's possibly there all the time, but drowned out by the engine/exhaust at higher speeds so I don't notice it.

Anyone else had this issue, or got any ideas what it might be?

700 Miles on it so far

Couple this with the MyLink issue and it looks like a trip to the dealer is needed :(
We apologize for your frustrations and inconveniences that you are experiencing with your vehicle. I would highly recommend taking it to the dealership as you stated. If things don't seem to be going smoothly, please let us know and we can set up a case with GM customer service.

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Old 11-01-2012, 07:30 AM   #8
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There is technical service bulletin on this...change the rear diff seals, and replace fluid.....dealer should know about it:
PI0137C

Real Axle Chatter Type Noise on Low Speed Turns :

10-12 Camaros with Limited-Slip Differential (RPO G80)
Replace both rear axle shaft seals, drain/refill the differential with new fluid, GM P/N 88862624
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Old 11-28-2012, 10:02 AM   #9
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I am having a similar problem with my '12 SS. What really irritates me is that I PAID my dealer to change out my diff fluid just over the Summer because I had read about what was going on with these. But I'm getting INCREDIBLE low humming noise between 1000 and 1300 or so RPMs when cruising or starting to roll. For a while i was wondering if my Borla ATAK system was vibrating incredibly or something, but I'm realizing that it's got to be this differential issue.

SOOOooo, now I'm out the money I paid to have the car serviced when in fact this is a warranty issue. What exactly should I do with this? Thoughts?

To be clear, the car makes the kind of sounds that a stick shift otherwise makes when you drive it in too low a gear for the speed, but in my car it happens when in the appropriate gear for gas mileage, during the computer assisted skip shift, or simply from a gentle roll. I've seen people refer to this as "chatter" but I don't think that's an accurate description for the sound so I want to make sure we are all talking about the same thing.
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Old 11-28-2012, 10:32 AM   #10
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Quote:
Originally Posted by markmass View Post
There is technical service bulletin on this...change the rear diff seals, and replace fluid.....dealer should know about it:
PI0137C

Real Axle Chatter Type Noise on Low Speed Turns :

10-12 Camaros with Limited-Slip Differential (RPO G80)
Replace both rear axle shaft seals, drain/refill the differential with new fluid, GM P/N 88862624
Talked to local dealer and he told me that this excludes the ZL1. Just as an FYI.
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Old 11-28-2012, 10:36 AM   #11
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Quote:
Originally Posted by 2012 ZL1#1658 View Post
Talked to local dealer and he told me that this excludes the ZL1. Just as an FYI.
ive read that aswell. also ive read not to run the additive. i had a 2 way lsd in my last car and also was told not to run any additive and to stick with 75 90 gear oil, im going to swap out to motul 75 90 after my first track session in the spring. its a very good ester based oil.
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Old 11-28-2012, 10:36 AM   #12
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When I took mine in for the same problem, the dealer told me there is a bulleting posted for the ZL1 to expect some chatter from the rear diff. So they did not do anything. I even mentioned it might need fluid change or additive.
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Old 11-28-2012, 10:54 AM   #13
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Old 11-28-2012, 12:17 PM   #14
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Quote:
Originally Posted by 69NMYSS View Post
When I took mine in for the same problem, the dealer told me there is a bulleting posted for the ZL1 to expect some chatter from the rear diff. So they did not do anything. I even mentioned it might need fluid change or additive.
change the fluid yourself. It will quiet down almost instantly. Use the GM LS gear oil as rx by the owners manual
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