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Moser 12 bolt

1675 Views 1 Reply 2 Participants Last post by  Exotic Performance Plus
I bought a HD aluminum rear cover, and since it's off, I'm re-installing with Lucas oil. Is there any reason to put GM additive in with an Eaton Posi? I know on the stock Fbody differential, you need to but is there any reason to with an Eaton or can I just use some off the shelf stuff?
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