Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Worth it to purchase? (GU5 Rear)

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Old Apr 10, 2010 | 06:48 PM
  #1  
Carlos773's Avatar
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From: Chicago, IL
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Worth it to purchase? (GU5 Rear)

So after going junkyard hunting I found this:

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After having my good pulling of what I needed, my inner third gen started tingling. So I started to look for the Rpo sticker and found out its a GU5 rear which is 3.23. The car is a 89 if I remember right and is a 3.1L V6.

Would it be worth it to purchase the rear? I think they would sell it at around $100-150 depending if I pick it up as a whole.

What do you guys think or Im I better off just buying new gears alone and upgrading?
Any idea how much that would cost and any good brands to look into?
What would upgrading to a Posi or closed diff cost and require to install? and same question about brands?


Thanks folks and yea, I was bumed about the car too, It was hit from the side Seemed like a nice car not much rust.

Last edited by Carlos773; Apr 10, 2010 at 11:17 PM.
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Old Apr 10, 2010 | 09:32 PM
  #2  
big gear head's Avatar
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Re: Worth it to purchase? (GU5 Rear)

It would be easier to install a posi in this rear end than it would be to install new gears in yours. I recommend a Eaton Posi. This is much better than most of the others that are available for the 7.5 rear end. The Eaton is $440 and bearings and shims to install it are $45. It installs like this. http://www.nastyz28.com/forum/showth...t=install+posi
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Old Apr 10, 2010 | 11:15 PM
  #3  
Carlos773's Avatar
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Supreme Member
iTrader: (3)
 
Joined: Jul 2009
Posts: 1,311
Likes: 3
From: Chicago, IL
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: Worth it to purchase? (GU5 Rear)

I was looking at the Powertrax lockright too but seems like for a bit more I might as well get a better deal and better for a DD. Ill keep the Eaton noted.

Any good places to pick up some good quality 3.42s?
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Old Apr 11, 2010 | 06:34 PM
  #4  
cabech984's Avatar
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Joined: May 2006
Posts: 137
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From: Dayton, Ohio
Car: 1990 Firebird
Engine: 6.0L LQ4
Transmission: 4L60E 4000 Stall
Axle/Gears: 3.23 G80 (01 TA)
Re: Worth it to purchase? (GU5 Rear)

IMO, a pick and pull rear axle wouldn't be worth it unless it was g80 limited slip. I'd keep an eye open on your local craigslist.
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