996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Is it normal for a LSD to make clicking / clunking sounds ?

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Old 06-17-2010, 09:28 PM
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Is it normal for a LSD to make clicking / clunking sounds ?

My GT2 always made a clicking / clunking sound when going in reverse with the steering wheel turned and if going forward from a standstill with the steering wheel turned. But only when I release the clutch to start moving.
Is this normal ?
My car is a 2003 GT2 with about 13,000 miles now and it has been doing it since day 1 (7,500 miles ago). When I asked the dealership 2 years ago, they said the sound was coming from the LSD and it was normal.
I just want to get a second opinion and to clear my head, Is this actually normal ?

The car runs perfect but the noise is a bit embarrasing. I am just not sure if these cars were designed to make clunking sounds like this..
 
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Old 06-17-2010, 09:55 PM
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aftermarket LSD's do this and it's normal. not sure about OEM system, but wouldn't see why not.
 
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Old 06-17-2010, 10:33 PM
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Mine occasionally makes this same noise, although only in reverse. I have the OEM LSD.
 
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Old 06-18-2010, 01:56 AM
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Jeez... mine sounds like it wants to come out the box, especially after a 25/30min session on the track (heat generated) but I run the RSR diff
 
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Old 06-18-2010, 02:43 AM
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My 90% plated ZF did the same. Not on a 911 but same principal.
TBD's dont though. They are very smooth in operation.
 
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Old 06-18-2010, 06:24 AM
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I have experienced this as well and its normal.
 
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Old 06-18-2010, 08:34 AM
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Thanks for the info !
Now I can clear my head and know for sure this is normal..
 
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Old 06-18-2010, 08:57 AM
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I was told LSD gears has larger space for expansion when it gets hot therefore you hear this noise.
 
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Old 06-18-2010, 09:16 AM
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Originally Posted by serge1ny
Thanks for the info !
Now I can clear my head and know for sure this is normal..
While the noise is "normal" you might want to determine if your LSD is actually working...

https://www.6speedonline.com/forums/...sd-buster.html
 
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Old 06-18-2010, 10:03 PM
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How can I determine if its working ?
 
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Old 06-19-2010, 10:56 AM
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If you read the thread I linked, you'll see the details of what to look for on a failed LSD.
 
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Old 06-19-2010, 01:19 PM
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Originally Posted by GTgears
If you read the thread I linked, you'll see the details of what to look for on a failed LSD.

Got it.. Great thread ! Now I will definately jack up the car and check.. Thanks.. I also enjoyed watching the track videos..
 
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