Metric vs Standard Rear Cylinder
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Junior Member
Joined: May 2020
Posts: 50
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Car: 1986 FIREBIRD
Engine: 2.8l V6
Transmission: 4 Speed automatic
Metric vs Standard Rear Cylinder
Hello, I'm looking at replacing the rear drum brake cylinders on my 1986 firebird, and was wondering if the threads on the cylinders are standard, or metric. Thanks in advance.
Supreme Member
Joined: Sep 1999
Posts: 3,042
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From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Metric vs Standard Rear Cylinder
In late '84 or early '85 the wheel cylinders were metric, so yours should be metric...
Joined: Aug 2006
Posts: 12,812
Likes: 110
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Metric vs Standard Rear Cylinder
They are metric, and be careful as the standard thread 1/8-27 is really close and will screw together to some extent.
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