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Which rearend lube to use?

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Old 07-08-2008, 09:33 PM
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Default Which rearend lube to use?

I've got the auburn differential with 3.73's in my 10 bolt. I'm about to get a rearend cover and wanted to know what's the right lube to use. Is it the 75w 90 and do I use any additives with that. Also how many quarts. I'm getting the thunder racing rearend cover.
Old 07-08-2008, 10:10 PM
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75w-90w non synthetic with 40z. oz. GM slip additive from dealer to start. Add all 8 oz. of slip add. if needed
Old 07-08-2008, 11:46 PM
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"non "synthetic with GM slip additive
I only ran 2 oz in my auburn ( while I was running it)I change oil and additive each 5 k miles
2 0z = more grip & more noise ( possible little growl on clutches)
4 oz = less grip ( more slip on auburn clutches) & less noise
just my .02' Johnny
Old 07-09-2008, 04:41 PM
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Thanks for the info. Does the rearend cover really beef up the 10 bolt?




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