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View Poll Results: What should i do with my rear end?
Find new/used Auburn unit and have gears installed at time posi unit is replaced.
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Find a Zexel Torsen unit and have gears installed.
1
100.00%
Find another 4th gen rear with better gears.
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Find another 4th gen rear and have gears i want installed.
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4th gen rear end issues....

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Old Sep 14, 2010 | 08:32 PM
  #1  
v10viper04's Avatar
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From: NY sucks
Car: 84' Corvette, 96' Caprice
Engine: LT1, L99
Transmission: T-56, 4L60e
Axle/Gears: 3.07 POSI, 2.93 Open
4th gen rear end issues....

Yes i have tried searching and i couldn't find what i was looking for.... Ok so i have a 4th gen rear in my car. It has 3.23 gears and its LS. MY problem is that she will only spin 2 wheels when I'm going straight and at the track i get a 50/50% chance that both will spin on launch.. The rear is out of a 95' Z28 (or so i was told) if i turn right or left and pin it i get a nasty one wheel peel.. which i'm NOT a fan of. I was told the 4th gens use Zexel Torsen units which don't need servicing or very rarely do. I shouldn't have an Auburn unit should I? (it deff IS a 4th gen rear, its 2" wider than my old one) I feel like i do b/c i can see springs in the POSI unit. The Zexel Torsen units don't have springs right? If i do have an Auburn unit what are my options? I would like to upgrade to 4.10's or 3.73's too at least...(attached picture is not MY unit but a unit that looks identical.) Thanks
Attached Thumbnails 4th gen rear end issues....-auburn-posi-unit.jpg  
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Old Sep 14, 2010 | 08:43 PM
  #2  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: 4th gen rear end issues....

Originally Posted by v10viper04
The rear is out of a 95' Z28 (or so i was told)
Auburn, 93-97
Zexel, 98+

Pics of the Auburn in the following link:

https://www.thirdgen.org/forums/tran...ing-axles.html

JamesC

Last edited by JamesC; Sep 14, 2010 at 08:48 PM.
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Old Sep 14, 2010 | 10:54 PM
  #3  
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From: Salina, KS
Re: 4th gen rear end issues....

Sure looks like an Auburn to me. It's probably well worn/worn out. I can't really give you any advice on how to rectify the problem short of replace it with a new one, or upgrade to a better carrier.

Edit: Where's the option to buy a new (not used) limited slip carrier, and install gears? Used crap is used crap, if you're going to spend money installing gears, do it once, do it right, and never worry about it again.
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Old Sep 15, 2010 | 03:20 PM
  #4  
v10viper04's Avatar
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Joined: Nov 2006
Posts: 1,724
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From: NY sucks
Car: 84' Corvette, 96' Caprice
Engine: LT1, L99
Transmission: T-56, 4L60e
Axle/Gears: 3.07 POSI, 2.93 Open
Re: 4th gen rear end issues....

Originally Posted by Drew
Sure looks like an Auburn to me. It's probably well worn/worn out. I can't really give you any advice on how to rectify the problem short of replace it with a new one, or upgrade to a better carrier.

Edit: Where's the option to buy a new (not used) limited slip carrier, and install gears? Used crap is used crap, if you're going to spend money installing gears, do it once, do it right, and never worry about it again.

Well i don't want to dump money into the 10 bolt. I don't want a rear i might break. I'll dump money into a 9" or 12 bolt but not a 10 bolt. I just was hoping to find a rear for sale with a good working posi and good gears already installed. But i don't get that lucky. haha
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