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Old 08-19-2014, 11:50 PM   #26
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subscribed to see how many other people have the issue and what happens.

Since NEW....talking 92 miles when I picked it up, it's had the much louder noise on deceleration. I think it usually happens when I take it out of gear and let off the gas....only when out of gear and slowing...
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Old 08-20-2014, 05:41 PM   #27
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Got it back today with new differential. No noises at all other than road noises. Hopefully lasts long. Was told to break it in for at least 500 miles.


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Old 08-20-2014, 05:50 PM   #28
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Aww... issues with the mighty ZL1? Only noise I hear in my SS is the sweet note from my headers and 3" exhaust.



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Old 08-20-2014, 05:51 PM   #29
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Aww... issues with the mighty ZL1? Only noise I hear in my SS is the sweet note from my headers and 3" exhaust.




LOL


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Old 08-20-2014, 05:51 PM   #30
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Till you snap your itty bitty ring gear
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Old 08-20-2014, 05:56 PM   #31
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Gonna change that soon.
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Old 08-20-2014, 09:17 PM   #32
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Got it back today with new differential. No noises at all other than road noises. Hopefully lasts long. Was told to break it in for at least 500 miles.


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great to see you got it back fixed. I may wait a week or to before I take mine in, still going to Sat. night
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Old 08-20-2014, 11:26 PM   #33
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Gonna change that soon.
Swap the toothpick axels while your at it sweet heart.
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Old 09-04-2014, 09:06 PM   #34
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Took my to the shop yesterday for the same problem. I hope it is something simple. Plus the vert top leaked into the back passanger side floor board.
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Old 09-05-2014, 01:15 AM   #35
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Swap the toothpick axels while your at it sweet heart.
OWNED!
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Old 10-08-2014, 09:45 PM   #36
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So the dealer replace some parts in the rear end 3 weeks ago. Now I had to bring it back in for noise during low speed turns. They put some slick 50 stuff in the rear end or what ever the offical part is. That did not work now they say they are replacing some cluches in the rear end. Never heard of clutches in the rear end? Any advice?
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Old 10-08-2014, 09:52 PM   #37
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So the dealer replace some parts in the rear end 3 weeks ago. Now I had to bring it back in for noise during low speed turns. They put some slick 50 stuff in the rear end or what ever the offical part is. That did not work now they say they are replacing some cluches in the rear end. Never heard of clutches in the rear end? Any advice?
The clutch packs, probably where the noise is coming from. Did they follow the procedure in the tsb? If they did they should have put about 50 miles on the car. They have done the tsb on mine twice. It has been quiet since. If the noise is slow turns it is cleaning out excess lashing compound in the clutch packs. If it is a noise on deceleration it is your backlash. That requires replacing the ring and pinion.

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Old 10-08-2014, 09:57 PM   #38
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Of course they did not follow the TSB and were not very happy when I called them out on it. They fixed the decel problem 500 miles ago. They said they did it the right way today and still have the noise. Now clutches.
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Old 10-08-2014, 10:04 PM   #39
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They will replace the clutch packs but you will probably get the noise back. The good thing it is mostly noise and I think little effect. It is a bombproof rearend. Maybe find a better dealer. I have a great relationship with mine and they always listen. They realize a lot of good information is passed on this site.

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Old 10-10-2014, 09:12 PM   #40
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Is there a tsb for the whine/howl on decceleration?

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Old 10-10-2014, 09:15 PM   #41
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Is there a tsb for the whine/howl on decceleration?

Tony
No, but if they inspect it they will see if the backlash is off.

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Old 10-10-2014, 10:28 PM   #42
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I wouldn't trust the average dealer mechanic to correctly set up a ring and pinion gear. Even with an experienced installer it's a trial and error process that usually takes a few install/removals to get it done correctly. I was fortunate enough that all the noise and slow speed groans went away when I changed the rear end fluid.
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Old 10-10-2014, 10:33 PM   #43
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Slick 50??? They still make/use that crap? ��
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Old 10-11-2014, 01:13 AM   #44
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I just had my rear diff replaced for howl on deceleration. I am very happy GM was willing to replace the whole thing. Very nice to not hear the noise anymore.
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Old 10-11-2014, 10:15 AM   #45
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I just had my rear diff replaced for howl on deceleration. I am very happy GM was willing to replace the whole thing. Very nice to not hear the noise anymore.

Mine was rebuilt and it came back then they replaced the entire thing. I still hear something at decel but no where near the amount of noise I heard before. I'm thinking it's the F1s now.
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