rear brake line size?
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Senior Member
Joined: Feb 2004
Posts: 814
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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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Joined: Jul 1999
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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.
If so, ¼" is very close, and should work if using SAE fittings.
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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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Joined: Jan 2003
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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....
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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Thread Starter
Senior Member
Joined: Feb 2004
Posts: 814
Likes: 1
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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