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Old 09-11-2010, 09:54 AM
Phrede Phrede is offline
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Default Diff. additive needed with synthetic fluid?

Subject line pretty much sez it.

I am getting ready to change the fluid in my rear '08 differential with limited slip. Do I need to add the friction modifier?
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Old 09-11-2010, 10:05 AM
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You need to add 4 ounces of LSD additive if you have the LSD rear end.
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Old 09-12-2010, 04:55 PM
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If you are running a stock LSD unit use the additive with the fluid. If it is something other than the factory check with the manufacturer.
I need to change the fluid in mine and was looking to go with synthetic but Auburn told me not to. For their units they recommend normal gear oil with the friction modifier.
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Old 10-01-2010, 09:07 PM
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Have to do mine as well. 02 9.25 Rear completely stock don't think it's LSD. Go Ahead and use the Additive as well? What Brand are you guys using?
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