Gear Oil

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Jul 18, 2014 | 10:30 AM

jimy

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Joined: Jun 2012

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From: Trophy Club Texas

Gear Oil

I'm going to change the gear oil in my 2007 Base M6. Some people say you must use Dextron 75w-90. Is that a must or a recommendation? What are other options?

Jul 18, 2014 | 11:23 AM

MachineSilver05C6

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Joined: Jan 2013

Posts: 94

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From: Florence KY

I used Amsoil Severe Gear and a tube of Slip Lock. Ive had no issues. I bought their hand pump which made filling the diff easy.

http://www.amsoil.com/shop/by-produc...e-gear-75w-90/

http://www.amsoil.com/shop/by-produc...-oil-additive/

http://www.amsoil.com/shop/by-produc...tle-hand-pump/

Jul 18, 2014 | 12:33 PM

mfoti

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Good Advice. This swap cured my rear end clunking problem when the GM fluid did not.

Quote:

Originally Posted by MachineSilver05C6

Jul 18, 2014 | 01:20 PM

SUB VETTE

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From: San Diego CA

The Dextron oil is GM recommended and contains a limited slip friction modifier to prevent limited slip clutch sticking which is the clunking frequently complained about. After experimenting with several oil and additive combinations to cure this problem, GM finally settled on this Dextron oil with additive and put out a technical Service Bulletin to implement the procedure at its dealers. When I changed over to the Dextron it cured all previous clunking my 06 had previously displayed since new. I have been happy ever since. It sure worked for me.

Jul 18, 2014 | 10:37 PM

cclive

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Joined: Mar 2008

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From: Southern Utah

Quote:

Originally Posted by SUB VETTE

Me too, "Dexron LS".

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