The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Keith Seymore · 04-13-2018, 01:38 PM

Short(er) answer after reviewing the '87 charts:

2.94 inch piston diameter for JB1, JB3, JB5 and JB6

3.14 inch for JB7

3.38 for JB8.

Wheel cylinders:

1.062 inch diameter for JB1 and JB3

.9375 for JB5

1.00 for JB6

1.062 for JB7 and JB8 SRW

1.188 for JB8 dual rear wheel

I can't answer the pedal ratio question. I only have the charts back to 1969 model year.

K

04-13-2018, 01:38 PM	#3
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,296	Re: Anybody know... Short(er) answer after reviewing the '87 charts: 2.94 inch piston diameter for JB1, JB3, JB5 and JB6 3.14 inch for JB7 3.38 for JB8. Wheel cylinders: 1.062 inch diameter for JB1 and JB3 .9375 for JB5 1.00 for JB6 1.062 for JB7 and JB8 SRW 1.188 for JB8 dual rear wheel I can't answer the pedal ratio question. I only have the charts back to 1969 model year. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 04-13-2018 at 01:49 PM.