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rear brake line size?

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Old Jun 26, 2004 | 12:17 AM
  #1  
flyitlikustolit's Avatar
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From: Savannah GA
Car: 1982 Trans Am
Engine: 383 chevy
Transmission: T-5
Axle/Gears: 4th gen 10-bolt, posi, 3.42 ratio
rear brake line size?

I swapped a 97 T/A rear into my 82 T/A, but i didn't notice that one of the metal lines (driver side) got pinched, almost closed. i try to bleed the rear brake on that side, and the fluid barely trickles out. my buddy has a flaring tool, so i was gonna buy some fittings and line, and cut out the pinched section, and put in the new line. what size line do i need to buy? specifically, what size line is a 97 trans am rear brake line?
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Old Jun 26, 2004 | 12:26 AM
  #2  
Petes 84Z28's Avatar
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From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
It's *probably* 6mm, but I can't be sure on that.
If so, ¼" is very close, and should work if using SAE fittings.
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Old Jun 26, 2004 | 01:58 AM
  #3  
flyitlikustolit's Avatar
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From: Savannah GA
Car: 1982 Trans Am
Engine: 383 chevy
Transmission: T-5
Axle/Gears: 4th gen 10-bolt, posi, 3.42 ratio
cool. I'll get 6mm, and some fitttings. thanks!
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Old Jun 26, 2004 | 05:12 PM
  #4  
Spdfrk1990's Avatar
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From: Cincinnati
I would just buy a new line for that side not that exspensive. Take it off goto the auto part store match up the length close then just bend it to fit doesnt have to be just like it was.
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Old Jun 27, 2004 | 03:38 AM
  #5  
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
good luck finding line thats actually metric. just get some 3/16 line that has metric threads (i think 10mm) of the european variety, and youll be set.
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Old Jun 27, 2004 | 09:02 AM
  #6  
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From: Cincinnati
I didnt have trouble findin any for mine when i did mine. Just make sure you use bubble flare.
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Old Jun 28, 2004 | 06:45 PM
  #7  
zhgrou6's Avatar
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From: Branchport NY - Finger Lakes region of New York State. Great cruising territory!
Car: '85 Firebird Sport Coupe
Engine: 305 4 barrel LG4
Transmission: TH-700R4
I agree. Buy pre-fab brake lines and put in a few S curves to take up the excess length. Be very sure you get the right match, ie metric vs SAE. I had an auto parts guy "assure" me that I had SAE. But nope. It was metric. And when I went to torque it in, the treads striped.

Now I take in my line and fittings and have the parts guys screw them into a caliper for me to make sure the thread was right. There should be no play in the fit.

AND don't try and make a bubble (ISO) flare. I blew $60 on a bubble flare kit, and I can't make a usable bubble flare at all. So now I just buy the pre fab lines and I am happy....
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Old Jun 29, 2004 | 01:34 AM
  #8  
flyitlikustolit's Avatar
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From: Savannah GA
Car: 1982 Trans Am
Engine: 383 chevy
Transmission: T-5
Axle/Gears: 4th gen 10-bolt, posi, 3.42 ratio
i did just that.... pre-fab line, 3/16 diameter, 20" long, and whatever fittings they were, they worked great. no more leaky. i bled me brakes and now i can stop
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