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Ishmael
08-24-2011, 04:51 PM
I've been told not to use posi additive with todays diff fluid. Maybe it was just with synthetic. Either way I haven't put any in as of yet. I've got a gm 8.5" posi.
any thoughts?

Gitter Dun
08-24-2011, 06:50 PM
Typically with synthetics it will tell you on the bottle wether or not to add posi additive. A good example would be Red Line synthetic. If I wasn't using a synthetic oil I would definitely use the additive.

dontlifttoshift
08-25-2011, 06:11 AM
it will never hurt to have it in there.....