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Old 10-26-2006, 08:23 PM
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Do i need to put in special lube for a posi?

took a rear end of a cutlass 12 bolt, 3.2??? gear ratio . better than what i had in there. any ways there was a tag that said put limited slip oil in there. should i? what would i use?? whats the best?

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Old 10-26-2006, 08:40 PM
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Old 10-26-2006, 11:16 PM
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Go the GM parts counter and ask for a bottle of Positraction Additive. If he doesn't know what you're talking about, go to the next guy.

Pour it into the rear end before you put the oil in.
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Old 10-27-2006, 05:00 PM
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Most of the parts stores (Autozone, etc.) also carry it, back in the area where they have axle grease and gear lubricant.

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Old 10-28-2006, 02:13 PM
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Posi Lube

I have had my 68 Chevelle with a 12 bolt posi init and have tried other posi additives from name brand oil companies and I have drained them back out because of heat and "snapping and popping" after the rear was up to temp. Without altering the clutches in the rear Just adding the GM lube It is fine and never acts up. It is a small 4 -8 oz bottle used to be clear plastic.
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Old 10-29-2006, 08:58 PM
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Mobil 1 syn gear oil will solve the problem of needing an additive.... it has worked well for me.

Dont worry how old you are... it is the mileage on your body that adds up.
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