c2 posi additive
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Tech Contributor
Joined: Aug 1999
Posts: 15,173
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From: Connecticut, USA
Always use 2 bottles of the current GM additive and a good gear oil, 90 or 85/140. You can look at the new slick oils but you do not need them. Do the figure 8's and that should cover it - if not then the posi needs work. If you have a 63-64 original DANA posi that is a whole different deal.
