Is the Factory 4th gen Posi Rebuildable? - Camaro Forums - Chevy Camaro Enthusiast Forum


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Old 08-10-2011, 12:26 PM
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Default Is the Factory 4th gen Posi Rebuildable?

The factory Auburn diff is worn pretty bad on my '94 Z28. I noticed some slipping on the street but I raced it this past weekend and it was impossible to put any power to the ground coming out of corners. I dont really have the budget for a whole new diff so I was hoping there is a rebuild kit for just the clutches or something.
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Old 08-10-2011, 01:38 PM
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yes there is
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Old 08-10-2011, 02:07 PM
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yes there is
has there ever been a question that stumped you?
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Old 08-10-2011, 02:32 PM
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yes there is
Great! Where can I find it and how much is it?
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Old 08-10-2011, 02:45 PM
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Quote:
Originally Posted by Kubs View Post
The factory Auburn diff is worn pretty bad on my '94 Z28. I noticed some slipping on the street but I raced it this past weekend and it was impossible to put any power to the ground coming out of corners. I dont really have the budget for a whole new diff so I was hoping there is a rebuild kit for just the clutches or something.
No, it's not "rebuildable". Although some replacement parts are available, you can't rebuild the part you're having slipping problems with....the cone clutch portion (assuming your clutches are gone).
You could either: Auburn D-Rex or look into upgrading your diff to the Torsen style like GM did with the later 4th gens.

Last edited by Camaro 69; 08-10-2011 at 02:50 PM.
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Old 08-10-2011, 03:15 PM
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right to rebuild you need to replace the differential case. do not have to replace the entire rearend. it may be cheaper if you can find one.
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Old 08-10-2011, 04:33 PM
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Yeah I spoke with the Auburn rep and she said there is no way I can do the exchange program because it is older than 4 years, and they will not re-build mine so mu only option is to buy something new. *sigh* Time to start putting money aside since SLP no longer sells $100 Torsen take offs.
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Old 08-10-2011, 05:14 PM
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Just a thought.... you didn't happen to put synthetic gear oil in the diff did you? You don't want to use synthetic with the auburn diff, as it could cause clutch slippage. 80w90 GL-5 conventional gear oil is what they recommend.
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Old 08-10-2011, 06:06 PM
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No it slipped when I bought it. I put AMSOIL in it, which actually helped a little but it still slips. I think I am going to save up for an Eaton that is rebuildable. I never liked the idea of the cone style clutches anyway.
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Old 08-10-2011, 06:15 PM
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"No" you didn't put synthetic in? What is Amsoil then? And what kind was the old oil that was in it before? Could be a previous owner already did the damage for you. Or possibly the clutches are just plain worn out. You never did say how many miles are on the diff.
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4th, 93, bracing, camaro, clutch, cone, convertible, factory, gen, posi, rebuildable, rebuilding, replacement, unit, z28

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