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LT1 rear disk swap

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Old Jul 18, 2013 | 06:36 AM
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Car: 1984 Trans Am
Engine: 355
Transmission: T-56
Axle/Gears: 10 Bolt, Torsen Diff, 3.73's
LT1 rear disk swap

Alright guys, so I bought a 10 bolt off of a guy on TGO to go on my '84 T/A, and it came with LT1 rear discs. It doesn't have the brake lines on it, as he needed them for his new rear. I know I need flex lines to the hard lines, and then I'm assuming a T to another flex so that the rear end can travel up and down.

Can someone tell me part numbers for anything that I need? I heard Ed Miller sells all this stuff, so maybe he'll chime in with a complete brake line kit for me. I've got the stock '84 calipers up front, but I'm looking to go braided on those flex hoses, as the OE ones are still on there, and I have a pull under braking, which I'm thinking might be that.

Would it be recommended to just replumb the whole brake system, or is it unlikely that the OE hard lines are causing the pull?
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Old Jul 18, 2013 | 01:09 PM
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dmwracing42's Avatar
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From: CT
Car: 1984 Trans Am
Engine: 355
Transmission: T-56
Axle/Gears: 10 Bolt, Torsen Diff, 3.73's
Re: LT1 rear disk swap

Ok, So I guess the better question is really pretty simple. If I go on Summitt and get braided flex line that fits the stock front and rear disk application, will that fit the LT1 brakes?
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Old Jul 19, 2013 | 06:18 AM
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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: LT1 rear disk swap

Originally Posted by dmwracing42
Ok, So I guess the better question is really pretty simple. If I go on Summitt and get braided flex line that fits the stock front and rear disk application, will that fit the LT1 brakes?
No. The PBR's have a flex line to each caliper; the Delco-Moraines only have one (and the lengths are different). The PBR calipers are virtually the same from 89-97. I'd guess you can purchase the hard lines from one of the following sites:

http://www.flynbye.com/catalog/i212.html

or

http://www.finelinesinc.com/

http://www.classictube.com/

http://www.inlinetube.com/

JamesC

Last edited by JamesC; Jul 19, 2013 at 10:35 AM.
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Old Jul 19, 2013 | 10:31 AM
  #4  
dmwracing42's Avatar
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From: CT
Car: 1984 Trans Am
Engine: 355
Transmission: T-56
Axle/Gears: 10 Bolt, Torsen Diff, 3.73's
Re: LT1 rear disk swap

Ohhhhh, so LT1 brakes are either PBR or Delco? The guy who I got them from said he had a flex line running to each caliper, so they must be PBR.

Thanks!
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Old Jul 19, 2013 | 10:34 AM
  #5  
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: LT1 rear disk swap

Originally Posted by dmwracing42
Ohhhhh, so LT1 brakes are either PBR or Delco? The guy who I got them from said he had a flex line running to each caliper, so they must be PBR.
82-88 Delco-Moraine. 89+ PBR.

JamesC
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Old Jul 19, 2013 | 11:04 AM
  #6  
dmwracing42's Avatar
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From: CT
Car: 1984 Trans Am
Engine: 355
Transmission: T-56
Axle/Gears: 10 Bolt, Torsen Diff, 3.73's
Re: LT1 rear disk swap

Yup, just did some research. Thanks man, flynbe has a complete rear kit, including flex lines and hard lines for the LT1 PBR's, fyi for anyone else who's doing this.
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