Suregrip additive

72 ScampTramp,

Here is what AMSOIL recommends.

http://www.amsoil.com/catalog.aspx?GroupID=88

One four-ounce bottle of Slip Lock treats differential capacities of two to four quarts.

NOTE: AMSOIL Synthetic Gear Lubes do not require the use of this additive. However, not all differentials respond the same and if chatter is noticed, the addition of AMSOIL Slip Lock will eliminate it. For chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.

Just for your information.
TAZZ