I'm changing the gear oil in my diffs to Amsoil. My truck has an anti spin rear axle. Do I need an additive. Also, do you guys use Red RTV for the Gasket maker?
Some need an additive and some don't, so try with out any additive but if it makes noise then add some. You don't need to use any RTV as the gaskets are 100% re-usable.
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