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Noise in rear differential

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Old Jun 16, 2008 | 03:41 PM
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Default Noise in rear differential

I just started hearing a grinding noise in my rear differential when turning tight at parking lot speeds . Is it done ?
Car is an 07 Z51 manual with 9k miles .
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Old Jun 16, 2008 | 03:50 PM
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Might be the dreaded differential chatter. You may need to take it in to change the fluid.
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Old Jun 16, 2008 | 04:20 PM
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Originally Posted by danl72
Might be the dreaded differential chatter. You may need to take it in to change the fluid.


It's most likely that. The dealer should do a reflush and it will hopefully solve the issue. However some members have stated that it comes back after awhile. There is a slip-lock additive from Amsoil that supposedly gets rid of the issue. However since it's under warranty, and if you don't mind the dealer touching your C6, have them do their work first.
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Old Jun 16, 2008 | 04:37 PM
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Sounds like you need the new fluid for the rear diff. The new fluid came out in January, 2008, and the revised service bulletin can be found here http://forums.corvetteforum.com/show....php?t=1917169

I had mine done last week, and it took care of the noise so far. As I understand it, there is no real damage being done when it is making noise, it is just annoying. But so far the new fluid has taken the noise away
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Old Jun 18, 2008 | 12:14 PM
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Thanks to you all it's fixed . Changed the fluid myself , perfect !
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Old Jun 18, 2008 | 12:40 PM
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Originally Posted by 4xchamp
Thanks to you all it's fixed . Changed the fluid myself , perfect !


Great news!
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Old Jun 18, 2008 | 12:41 PM
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The new fluid is the LS75-90 of which you do not add the additive. Fixed mine so far. Changed it at 7,000 miles and it's now at 8,500.
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Old Jun 18, 2008 | 09:43 PM
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Default see past thread here... same problem

http://forums.corvetteforum.com/show....php?t=2030777
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