The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-06-2014, 08:53 PM   #1
Mason_99
Registered User
 
Join Date: Aug 2014
Location: Appomattox, VA
Posts: 12
Which brakes do I have?

I've been looking to buy new front brake hoses for my '87 R10 Custom Deluxe on stylintrucks.com. The problem I'm having is they're listing hoses for trucks that have 11" x 2" brakes or 11 5/32" x 2 3/4" brakes. How do I know which brake package I have? Is their an RPO code or anything I need to look for?
Mason_99 is offline   Reply With Quote
Old 09-06-2014, 09:37 PM   #2
MountainGoat1966
Registered User
 
Join Date: Jan 2010
Location: northern arizona
Posts: 259
Re: Which brakes do I have?

Remove a rear wheel and drum and measure is the most exact way to find out.
__________________


"Off the grid and on the seven day weekend plan"

"One person cannot know everything, but between all of us, there isn't much we don't know."
MountainGoat1966 is offline   Reply With Quote
Old 09-06-2014, 10:25 PM   #3
Mason_99
Registered User
 
Join Date: Aug 2014
Location: Appomattox, VA
Posts: 12
Re: Which brakes do I have?

Quote:
Originally Posted by MountainGoat1966 View Post
Remove a rear wheel and drum and measure is the most exact way to find out.
I need to measure the rear drums to figure out which brake hoses I need for the front?
Mason_99 is offline   Reply With Quote
Old 09-06-2014, 10:39 PM   #4
MountainGoat1966
Registered User
 
Join Date: Jan 2010
Location: northern arizona
Posts: 259
Re: Which brakes do I have?

I know it sounds strange.
I needed new front calipers and brake hoses for my 83 C20 and the part number mattered for what brakes I had, and what rear axle.
Since i have the big heavy duty 13" rear brakes, that told me the whole truck had the heavy duty parts, so different calipers and hoses.
__________________


"Off the grid and on the seven day weekend plan"

"One person cannot know everything, but between all of us, there isn't much we don't know."
MountainGoat1966 is offline   Reply With Quote
Old 09-07-2014, 12:22 AM   #5
Mason_99
Registered User
 
Join Date: Aug 2014
Location: Appomattox, VA
Posts: 12
Re: Which brakes do I have?

Quote:
Originally Posted by MountainGoat1966 View Post
I know it sounds strange.
I needed new front calipers and brake hoses for my 83 C20 and the part number mattered for what brakes I had, and what rear axle.
Since i have the big heavy duty 13" rear brakes, that told me the whole truck had the heavy duty parts, so different calipers and hoses.
Thanks for the help! I went and check the codes in my glove box and I have 9J50 power brakes. I've done some searches, does that mean I have JB5 brakes?
Mason_99 is offline   Reply With Quote
Old 09-07-2014, 05:57 PM   #6
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,226
Re: Which brakes do I have?

Probably. It's the most common system for an R10.

Here is the brake system release chart for 1987. See if this helps (they are released by GVW).

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/
Keith Seymore is offline   Reply With Quote
Old 09-10-2014, 02:12 PM   #7
Mason_99
Registered User
 
Join Date: Aug 2014
Location: Appomattox, VA
Posts: 12
Re: Which brakes do I have?

I checked my GVWR in my door jamb and it says 5200 lbs. Looking at the chart I assume that would mean its not the JB5 and should have the 11"x2" rear brakes?
Mason_99 is offline   Reply With Quote
Old 09-10-2014, 03:17 PM   #8
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,226
Re: Which brakes do I have?

Yes - sounds like you have the JB3 brakes.

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/
Keith Seymore is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:32 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com