[obarry13]

Originally Posted by KingLeo

I have the same issue with the Diff and my dealer is replacing the whole thing. What I heard was there were a batch of differentials where some of the metal plates between the clutches are backwards, loaded in the wrong order or there are 2 metal ones next to each other. I was told GM wants it back for further inspection and as soon as mine comes in from Lansing they will get it swapped out.

Could you do me a solid and ask your service rep where he found this info or went about getting it? I feel like I am going to have to spoon feed my dealer on how to check.

[StarkIndustries]

Can anyone record this sound and send it to me? I would love to know if I have the same problem. Mine has no problem on start up but going up to speed it's a squeak or rattle vibration like a bracket is missing and something is rubbing up underneath.

[KingLeo]

Originally Posted by obarry13

Could you do me a solid and ask your service rep where he found this info or went about getting it? I feel like I am going to have to spoon feed my dealer on how to check.

Sure will

[pkssauce]

Originally Posted by StarkIndustries

Can anyone record this sound and send it to me? I would love to know if I have the same problem. Mine has no problem on start up but going up to speed it's a squeak or rattle vibration like a bracket is missing and something is rubbing up underneath.

I would like to hear this too. Hi Stark!

[obarry13]

Originally Posted by KingLeo

Sure will

Any chance you have had time to ask your dealer about this yet?

Also, I recorded two short clips of the exact noise my car is making. I found a quiet parking garage so that the audio would come through better. The squeak noise seems rotational when at slow speeds. Also, around 0:17 second mark, you will hear a random squeak/chirp. That happens at any and all speeds occasionally as well. You will also hear some brake squeak coming from my passenger rear towards the end during the rotational squeak too.



I don't know if the audio will come through, but I also have one other issue that started at the same time. After a cold start, and when the temp outside is under about 70 degrees, when I make my first hard turn I hear a rubbing sound which you can hear in the first 3 seconds of this video (might be hard to hear with the acceleration noise) and occasionally a thud. There is absolutely nothing physically rubbing in or around my wheel well. I am guessing this is the same issues others are having?



I can only guess these issues are due to the rear differential unless someone with more expertise could chime in?

[pkssauce]

Originally Posted by obarry13

Any chance you have had time to ask your dealer about this yet?

Also, I recorded two short clips of the exact noise my car is making. I found a quiet parking garage so that the audio would come through better. The squeak noise seems rotational when at slow speeds. Also, around 0:17 second mark, you will hear a random squeak/chirp. That happens at any and all speeds occasionally as well. You will also hear some brake squeak coming from my passenger rear towards the end during the rotational squeak too.



I don't know if the audio will com through, but I also have one other issue that started at the same time. After a cold start, and when the temp outside is under about 70 degrees, when I make my first hard turn I hear a rubbing sound which you can hear in the first 3 seconds of this video (might be hard to hear with the acceleration noise) and occasionally a thud. There is absolutely nothing physically rubbing in or around my wheel well. I am guessing this is the same issues others are having?



I can only guess these issues are due to the rear differential unless someone with more expertise could chime in?

That second video is what mine sounds like (I think, like you said, hard to hear)

[Wiskey]

I'll be taking mine in for this tomorrow morning. In my car it sounds like a rubbing,.. Almost like what a car with a welded axle sounds like when it corners, but not nearly as bad. The dealer looked into it and found the TSB in my case, and said my VIN falls in the affected range.

Whiskey

[Rob13567]

Originally Posted by obarry13

Any chance you have had time to ask your dealer about this yet?

Also, I recorded two short clips of the exact noise my car is making. I found a quiet parking garage so that the audio would come through better. The squeak noise seems rotational when at slow speeds. Also, around 0:17 second mark, you will hear a random squeak/chirp. That happens at any and all speeds occasionally as well. You will also hear some brake squeak coming from my passenger rear towards the end during the rotational squeak too.



I don't know if the audio will com through, but I also have one other issue that started at the same time. After a cold start, and when the temp outside is under about 70 degrees, when I make my first hard turn I hear a rubbing sound which you can hear in the first 3 seconds of this video (might be hard to hear with the acceleration noise) and occasionally a thud. There is absolutely nothing physically rubbing in or around my wheel well. I am guessing this is the same issues others are having?



I can only guess these issues are due to the rear differential unless someone with more expertise could chime in?

mine makes the same noise, at first i thought it was the brakes. is this the rear diff?

[KingLeo]

Originally Posted by obarry13

Any chance you have had time to ask your dealer about this yet?

Also, I recorded two short clips of the exact noise my car is making. I found a quiet parking garage so that the audio would come through better. The squeak noise seems rotational when at slow speeds. Also, around 0:17 second mark, you will hear a random squeak/chirp. That happens at any and all speeds occasionally as well. You will also hear some brake squeak coming from my passenger rear towards the end during the rotational squeak too.



I don't know if the audio will com through, but I also have one other issue that started at the same time. After a cold start, and when the temp outside is under about 70 degrees, when I make my first hard turn I hear a rubbing sound which you can hear in the first 3 seconds of this video (might be hard to hear with the acceleration noise) and occasionally a thud. There is absolutely nothing physically rubbing in or around my wheel well. I am guessing this is the same issues others are having?



I can only guess these issues are due to the rear differential unless someone with more expertise could chime in?

I Did ask and was told it was nothing official. Just other service directors he has been in contact with. I will try to nail it down today when I pick up my car.
the chirp at 17 sec sounds like like the V8/V4 noise it makes when it switches. My does this also and the fix is some dri-slide lube the can coat the value with.

The rest of the sounds and the sec video is what I was hearing. The dealer tried to flush/refill and add some friction additive but that didn't work.



We are also trying to get rid of the vibration rattle that is coming from the NPP since the exhaust is just laying there.

[obarry13]

Originally Posted by KingLeo

I Did ask and was told it was nothing official. Just other service directors he has been in contact with. I will try to nail it down today when I pick up my car.
the chirp at 17 sec sounds like like the V8/V4 noise it makes when it switches. My does this also and the fix is some dri-slide lube the can coat the value with.

The rest of the sounds and the sec video is what I was hearing. The dealer tried to flush/refill and add some friction additive but that didn't work.

That actually makes a lot of sense now about the chirp at 17 seconds. I know there is a screen on the dash that shows if you are in V8 or V4, I will test it this afternoon to confirm. Edit: I did a little research, and it seems like it is a VERY common problem on Chevys. Some people clamp it to stay open (i guess always in V8 mode?) or have to lube it every once and a while. Knowing my dealer, I doubt they would be willing to help with it. Is it easy to get to if you don't have access to a lift?

Also kind of good to hear that the squeaking is the same as yours, now I know for sure it is the same issue everyone else here is having. I did remember seeing some people needed to get a completely new rear diff due to wrong gears in it.

[Imp]

Originally Posted by obarry13

Any chance you have had time to ask your dealer about this yet?

Also, I recorded two short clips of the exact noise my car is making. I found a quiet parking garage so that the audio would come through better. The squeak noise seems rotational when at slow speeds. Also, around 0:17 second mark, you will hear a random squeak/chirp. That happens at any and all speeds occasionally as well. You will also hear some brake squeak coming from my passenger rear towards the end during the rotational squeak too.

Are you willing to try something to rule something out? Something simple that can be done in your driveway.

Have you removed your wheels at all? I've heard this sound (or something similar) when the wheel lug nuts are not torqued properly (either over or under, doesn't matter).

I don't know what the torque rate is, but to test, I would take your rear wheels off, rotate about 180 (I know you can't do exactly 180, but at least 2 or 3 lugs worth, not just one), remount and re-torque the lug nuts to their proper torque (should be in the manual).

Just to eliminate the possibility of it just being the wheels weren't mounted correctly or properly checked during PDA.

--kC

[obarry13]

Originally Posted by Imp

Are you willing to try something to rule something out? Something simple that can be done in your driveway.

Have you removed your wheels at all? I've heard this sound (or something similar) when the wheel lug nuts are not torqued properly (either over or under, doesn't matter).

I don't know what the torque rate is, but to test, I would take your rear wheels off, rotate about 180 (I know you can't do exactly 180, but at least 2 or 3 lugs worth, not just one), remount and re-torque the lug nuts to their proper torque (should be in the manual).

Just to eliminate the possibility of it just being the wheels weren't mounted correctly or properly checked during PDA.

--kC

Good timing! I am actually getting my MRR 228 rims and tires put on as we speak. I should have my car back in a couple of hours so I can rule that out or say that was the issue for sure later tonight.

[Imp]

I hope they hand torque them and not impact to put them back on. (Just a pet peeve of mine). Tell them you're trying to diagnose something and would like them done by hand (and many times they say they have torque sticks, don't buy that for one second - insist on hand.)

[Wiskey]

So my dealer said that it's normal for a Camaro to make these noises every morning and it's due to the fact that this car uses a high performance rear end. Every morning the clutches need to be soaked in oil before they start operating smoothly, and that this will get better as the car breaks in.

My car does only have 2,600 miles on it.

I'll give it a few oil changes and see if it goes away.

Whiskey