9 bolt brake problems - Third Generation F-Body Message Boards

Brakes Looking to upgrade or get the most out of what you have stock? All brake discussions go here!
Sponsored by:
Sponsored by:

9 bolt brake problems

Thread Tools Search this Thread
Old 09-19-2011, 01:51 PM   #1
Junior Member
Thread Starter
Join Date: Jan 2011
Location: Bristol CT
Posts: 8
Car: 1987 Iroc Z28
Engine: 5.7L 350 Carburated
Transmission: 700R4
Axle/Gears: 3.27 9bolt

9 bolt brake problems

I Just installed a 9-bolt 3.27 In my 87 Camaro. The rear came with drum brakes. Im having a problem with the drums scraping and the backing plates. It even appears that the last guy who had this rear used washers around the studs on the axle before he slid the drums on. I was thinking maybee the drums were the wrong ones and for a 10 bolt or something and I wouldnt even know if there was a difference between 9 bolt and 10 bolt drums. Im not sure what to do. Should I try to just get a conversion kit to go to disk? Do they make one? Or is there a way to remedy the drums scaping on the backing plates? Has anyone else gone thru this or have any helpful suggestions. It would be greatly appriciated.
mchooks1234 is offline   Reply With Quote
Old 09-20-2011, 11:31 AM   #2
Supreme Member
Join Date: May 2005
Location: Malvern, Arkansas
Posts: 1,023
Car: 90 IROC 2-92 Zs blk vert & prpl
Engine: stealth ram brodix track 1 ful port
Transmission: 700r4 4l80e
Axle/Gears: iroc 375 lokr 92 Z 277 pos vert 327

Re: 9 bolt brake problems

Call hawks or someone and get the PBR rear disc set-up. I think someone stole the rear disc off of yours since not many 9 bolts had drums but some of them did. The PBR rear disc set-up came on 89 cars only. I think the calipers are the same on the 88-96 corvette and 89-92 camaro and trans am. If you can get the backing plates the rest should be easy but you can probably get an entire set-up from hawks. I remember seeing a third gen place from Florida that usually has 9 bolt PBR stuff for sale but I can't remember there name. The brakes are 11.7 inches wide and are as good as about anything out there. I just installed a 89 trans am 9 bolt PBR posi rear in my 92 Z convertible and it works great. I have three of the rears and one ford 9 but for 400HP or less a 9 bolt with PBRs is the way to go. Like most people I thought a 10 bolt was better untill I looked at the engineering of the 9 bolt and it is far superior to a 10 bolt. Parts are harder to get but worth the headache.
abray1 is offline   Reply With Quote
Old 09-21-2011, 06:43 AM   #3
iTrader: (5)
JamesC's Avatar
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 18,940
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's

Re: 9 bolt brake problems

Originally Posted by mchooks1234 View Post
I was thinking maybe the drums were the wrong ones and for a 10 bolt or something and I wouldnt even know if there was a difference between 9 bolt and 10 bolt drums. Should I try to just get a conversion kit to go to disk? Do they make one?
There's no difference between 9- and 10-bolt drums. Here's a link to the backing plates you'll need for a conversion. Remember you'll need parking brakes cables, speedo gear(s) probably, and for best brake performance, a 1LE combination valve.


JamesC is online now   Reply With Quote
Old 09-28-2011, 07:48 PM   #4
Senior Member
Sojer's Avatar
Join Date: Jun 2011
Location: Detroit, MI
Posts: 938
Car: 1987 IROC-Z red t-top
Engine: Nothing much
Transmission: I wish t56
Axle/Gears: 9bolt 3.27 4sale

Re: 9 bolt brake problems

My 3.27 have rotors I will be selling it soon will be getting a 4th gen I may fix it up more new clutch cones and a gridle put new brakses on it see can I get 5 to 700 for it
Sojer is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1992 camaro 305 v8 TBI idles very high and shifts at high idles db057 TBI 12 03-16-2017 08:20 AM
[NJ] Pbr brake rear disk setup 9 bolt Eric-86sc Engine/Drivetrain/Suspension Parts for Sale 3 04-03-2016 03:52 PM
Aje complete tube front end setup, aerospace brakes complete lsx turbo setup Terrell351 Engine/Drivetrain/Suspension Parts for Sale 4 01-18-2016 10:35 AM
PBR rotors rubbing on a '95 9 bolt ZMWojnar Brakes 2 08-17-2015 12:27 AM
Brake pedal going to the floor... Ginamariegault Brakes 1 08-10-2015 08:33 AM

Go Back   Third Generation F-Body Message Boards >

87, 9bolt, backing, bolt, brake, brakes, camaro, camaros, cane, drum, f150, fit, plate, problems, rear, scraping

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92

All times are GMT -5. The time now is 08:59 PM.

All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: