10 Bolt Rear Axle Oil Change w/ Factory Limited Slip
- Thread starter 89Suburban
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Exactly 2 quarts front and back, here is a guide I made, at the bottom of the linked post.
http://www.gmsquarebody.com/forum/showthread.php?t=848&highlight=guide
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I don't have the LS additive for the rear listed as I just rolled with the gear oil. If you want to know the additive I am sure somebody here will chime in with the correct type and how much.
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Not sure which LS you have John, I just know its not the Gov-Lok junk. Likely an Auburn LS unit. But, if the book or that unit requires the LS additive, don't fugg around and get it in there. You just might be tearing up and wearing out your LS clutches if that's the type of unit it is.
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How do I tell? Can you help? Do the pics here tell?
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I'll see what I can figure out. I say better safe than sorry and put it in. It can't hurt if its not needed. But, I think I tried to identify that unit before and the closest I came was an Auburn unit. We'll see if the Auburn unit requires it.
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Thanks.
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Looking at this exploit and reading that it does goes into GM vehicles OEM, I'll feel confident in saying you do have the Auburn LS Carrier. Now to find out what oil it requires. I'm not seeing any clutches, so you maybe OK without the LS additive.
http://www.drivetrain.com/parts_catalog/positraction/auburn_positractions_lsd.html
http://www.drivetrain.com/parts_catalog/positraction/auburn_positractions_lsd.html
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See, that's what I was thinking because it just looks like some springs and steel pressure plates to me in there.
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According to this link the axleshaft spider gears are cone shaped and act as a clutch against the diff housing?
http://www.arkansaspontiacs.org/techstories/auburndiff_files/auburnfix.html
http://www.arkansaspontiacs.org/techstories/auburndiff_files/auburnfix.html
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OK, so now I think I get how this works now. Those cone shape spiders that go onto the axle gear wedge themselves in the carrier housing with the force of the springs. So over time, the cones have wore down and now wouldn't engage the carrier like a wedge. So what he did, was took some meat off the back of the coned gears, so they could push further into the carrier and get the wedge affect again. This would be a good fix, but each time you turn down the cones, you're pushing the cone deeper and deeper into the carrier housing and eventually the springs are not going to push that far with enough strength. You'd think he could buy new cone gears and be good as new again if the carrier housing hasn't opened up the cone holes any more. But buddy, I think I'd go ahead and get the additive to reduce the wear on the cones and the housing where the cones wedge against it. Or, maybe even run synthetic gear oil.
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I don't know what it is, but it sure ain't factory.
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You don't think his Auburn is factory? I'm just about 100% certain its an Auburn LS unit, and it appears to be an OEM unit. There is a difference in the OEM units and the aftermarket units. I remember that the last time I was researching this. Can't remember now for sure. Seemed like the carrier was squared off or rounded edges in one of the other. There is a difference though.
