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Poll: Does your 915 w/ LSD make a binding/grinding noise or sensation when turning sharp?
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Does your 915 w/ LSD make a binding/grinding noise or sensation when turning sharp?

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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,844
I had this happen on American cars, and a simple fluid change remedied.

Old 04-03-2015, 10:16 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #41 (permalink)
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LJ851's Avatar
 
Join Date: May 2010
Location: atlanta
Posts: 1,430
Since the trans is apart it seems like a good time to at least inspect the LSD to check for damage and clutch wear.

I have a factory zf lsd in my car and it makes zero noises/grinding sounds. It is completely quiet. I have kendall fluid in it.
Old 04-03-2015, 01:15 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #42 (permalink)
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Join Date: Jul 2017
Location: Kitchener, Ontario, Canada
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Found this thread which describes my symptoms as well - 81 SC with factory LSD. Had some work done recently, and the shop put in Kendall 75w90 which is a synthetic oil. Symptoms started immediately, and while not horrible, they were definitely there (and were not there before the work was done). Drove about 100 miles with the 75w90.

I drained the oil overnight, put in a sacrificial quart of Kendall 80w90 LS GL-5, drained again and filled with the 80w90. Assuming there are no underlying mechanical issues with the LSD, how quickly will the oil change take effect? Drove for 1/2 hr and it wasn't immediately better - but assuming there will still be some of the 75w90 between the plates in the LSD clutch that needs to be replaced. Is this a case where it will be a slow improvement over the next 100 miles or so?

Old 08-18-2020, 08:21 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #43 (permalink)
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