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

rear end swap?

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Old Apr 18, 2011 | 10:39 PM
  #1  
kill4thril's Avatar
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From: liverpool ny
Car: 1990 firbird formula
Engine: 355ci
Transmission: t56 spec3+ cluch
Axle/Gears: 9 bolt disc brake 2.77
rear end swap?

ok so my friend is selling me a rear end out of a third gen with disc rear my car has drums now and i was just wondering if the rear end would bolt up with everything like the brake lines and e brake cabel?
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Old Apr 18, 2011 | 10:44 PM
  #2  
BlackenedBird's Avatar
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: rear end swap?

Yep. 100% direct bolt-in & it will be up to you if you want to swap out the master cylinder, to a 4-wheel disc master. Some people do, some people don't. But it isn't required to.
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Old Apr 19, 2011 | 06:42 AM
  #3  
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: rear end swap?

While the rear end is a bolt-in, you'll need new parking brake cables, new speedo drive and/or driven gears (if the new rear is a different ratio that the original), and for best brake performance, a new combination valve as the bias changes from drum to standard disc to 1LE. The car will stop without changing the aforementioned valve, but why bother swapping if you don't do the swap correctly? It's unnecessary to change the master cylinder. You'll find more detailed info in the following link:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC
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