How to get brake pedal out of 89 Mustang

Slickfoot · 08-14-2015, 12:19 AM

Took the Mustang to the strip last Friday, to try out after new cam ,headers ,and valve job. And I could not hold it on the line above 1000 rpm. I am now switching over to a Aerospace manual master cylinder and a Bear adjustable proportioning valve. I need to drill the pedal arm to get a 7:1 ratio. How in the world do you get that arm out. This 89 HB and once was a stick car. And also what do you do for a positive stop for the arm . help
Thanks
Slickfoot

HandOverFist · 08-14-2015, 01:18 AM

It was a horrible experience working on mine as well Slick. You will need to remove the driver seat so you can lie on your back...the work under the dash will require patience, ingenuity with tools and bountiful cursing. Being under 60 years of age would surely help matters I'm guessing.

HawkBrosMav · 08-14-2015, 01:41 AM

We have a Raybestos stock replacement master cylinder on our that i think is meant for a SVO mustang of an earlier year. We bought the Steada manual conversion mount to eliminate the power unit and made no modifications to brake pedal ratio. Car holds to over 3000 RPM if you really want to push on it but we 2 step it to around 2500-2600 no issues.. This car also had had both stock front and rear brakes and now has aerospace disc on all 4 wheels and we've changed nothing in the master cylinder setup. might be cheaper and easier to look into a different master cylinder if aerospace is telling you that you need to have a certain ratio to make it work properly..

Brad

Marty Hignight · 08-14-2015, 08:15 AM

You do need to change the ratio with aero space master Cylinder. It is hard to get out like hand over fist said. Once it is out you drill the pedal for a new bolt that changes the ratio. I have 4 wheel disc from aero space on my 1988 and can get 1900 plus psi pressure. I did put a line lock on each front wheel. I can hold 3000 rpm pretty easily

FireSale · 08-14-2015, 10:07 AM

Having done something similar on a 68 coupe, I offer my sympathies. I removed the seat and steering column to reach the sucker.

To Riches patience, cussing and ingenious use of tools, add a nice box of bandaids. And aspirin...

Dale

Rory McNeil · 08-14-2015, 03:57 PM

I don`t know if the earlier FOX Mustangs like my 85 are different, but I find it easier to just remove the entire brake/clutch pedal bracket out as an assembly than removing the brake pedal alone. You need to drop the steering column down, but with those 2 nuts removed, and 4 nuts securing the bracket to the power brake booster, or manual brake adapter mount, plus i screw at the dash frame, and it comes out in about 1/2 hour. On my 85, I used an actual manual brake pedal, adapter and master cylinder for a 79-82 Mustang from the local wrecking yard. On my cars, there are 2 different brake pedal pivot positions, 1 for manual, one for power brakes. By 89, I assume power brakes were standard, so your bracket may only have the 1 hole.

Painter · 08-14-2015, 04:15 PM

A line lock on each front wheel sounds like a major invitation for disaster. Rethink this please. It might have been easier to install, but a problem with one makes the turn, and there is nothing you can do about it.

partsbob67 · 08-14-2015, 08:16 PM

remove the drivers seat, then the dash assy complete. easiest way I have found when I did mine.

Slickfoot · 08-14-2015, 09:40 PM

So far I got seat out , lower dash out, upper dash out, and I have to see the nut toward the pass. side yet. called it a night. hit it again Saturday
Thanks for the reply.
Slickfoot

Eman · 08-15-2015, 12:05 AM

I've been able to just remove the bolt but it's probably easier to remove the whole quadrant. If you remove it all it makes it easy to mock it all up including mounting the MC. You can make a guide for the brake rod and weld it in so it would be impossible for it to pull out of MC and fall down. I've also mocked it all up and bled the MC by pushing the pedal while it's all in a vise, much easier. For a stop you can weld a piece of tubing at an angle and use a bolt in it with nuts on either end of the tubing as an adjustment.

08-14-2015, 12:19 AM	#1
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	How to get brake pedal out of 89 Mustang Took the Mustang to the strip last Friday, to try out after new cam ,headers ,and valve job. And I could not hold it on the line above 1000 rpm. I am now switching over to a Aerospace manual master cylinder and a Bear adjustable proportioning valve. I need to drill the pedal arm to get a 7:1 ratio. How in the world do you get that arm out. This 89 HB and once was a stick car. And also what do you do for a positive stop for the arm . help Thanks Slickfoot

08-14-2015, 01:18 AM	#2
HandOverFist VIP Member Join Date: Oct 2013 Location: Gulf Breeze, FL Posts: 1,651 Likes: 8 Liked 33 Times in 16 Posts	Re: How to get brake pedal out of 89 Mustang It was a horrible experience working on mine as well Slick. You will need to remove the driver seat so you can lie on your back...the work under the dash will require patience, ingenuity with tools and bountiful cursing. Being under 60 years of age would surely help matters I'm guessing. __________________ Rich Taylor I/SA - 321

08-14-2015, 01:41 AM	#3
HawkBrosMav Member Join Date: Apr 2009 Posts: 362 Likes: 6 Liked 302 Times in 73 Posts	Re: How to get brake pedal out of 89 Mustang We have a Raybestos stock replacement master cylinder on our that i think is meant for a SVO mustang of an earlier year. We bought the Steada manual conversion mount to eliminate the power unit and made no modifications to brake pedal ratio. Car holds to over 3000 RPM if you really want to push on it but we 2 step it to around 2500-2600 no issues.. This car also had had both stock front and rear brakes and now has aerospace disc on all 4 wheels and we've changed nothing in the master cylinder setup. might be cheaper and easier to look into a different master cylinder if aerospace is telling you that you need to have a certain ratio to make it work properly.. Brad

08-14-2015, 08:15 AM	#4
Marty Hignight Member Join Date: Apr 2009 Location: Florida Posts: 108 Likes: 83 Liked 23 Times in 14 Posts	Re: How to get brake pedal out of 89 Mustang You do need to change the ratio with aero space master Cylinder. It is hard to get out like hand over fist said. Once it is out you drill the pedal for a new bolt that changes the ratio. I have 4 wheel disc from aero space on my 1988 and can get 1900 plus psi pressure. I did put a line lock on each front wheel. I can hold 3000 rpm pretty easily __________________ Marty H

08-14-2015, 10:07 AM	#5
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: How to get brake pedal out of 89 Mustang Having done something similar on a 68 coupe, I offer my sympathies. I removed the seat and steering column to reach the sucker. To Riches patience, cussing and ingenious use of tools, add a nice box of bandaids. And aspirin... Dale __________________ Dale Shearon 68 Mustang 6394

08-14-2015, 03:57 PM	#6
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 315 Liked 1,103 Times in 301 Posts	Re: How to get brake pedal out of 89 Mustang I don`t know if the earlier FOX Mustangs like my 85 are different, but I find it easier to just remove the entire brake/clutch pedal bracket out as an assembly than removing the brake pedal alone. You need to drop the steering column down, but with those 2 nuts removed, and 4 nuts securing the bracket to the power brake booster, or manual brake adapter mount, plus i screw at the dash frame, and it comes out in about 1/2 hour. On my 85, I used an actual manual brake pedal, adapter and master cylinder for a 79-82 Mustang from the local wrecking yard. On my cars, there are 2 different brake pedal pivot positions, 1 for manual, one for power brakes. By 89, I assume power brakes were standard, so your bracket may only have the 1 hole. __________________ NHRA 6390 STK M/S 85 Mustang

08-14-2015, 04:15 PM	#7
Painter Member Join Date: Dec 2012 Posts: 227 Likes: 4 Liked 162 Times in 45 Posts	Re: How to get brake pedal out of 89 Mustang A line lock on each front wheel sounds like a major invitation for disaster. Rethink this please. It might have been easier to install, but a problem with one makes the turn, and there is nothing you can do about it.

08-14-2015, 08:16 PM	#8
partsbob67 Member Join Date: Apr 2005 Location: rohnert park,ca Posts: 414 Likes: 11 Liked 79 Times in 11 Posts	Re: How to get brake pedal out of 89 Mustang remove the drivers seat, then the dash assy complete. easiest way I have found when I did mine. __________________ bob beals 7244

08-14-2015, 09:40 PM	#9
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Re: How to get brake pedal out of 89 Mustang So far I got seat out , lower dash out, upper dash out, and I have to see the nut toward the pass. side yet. called it a night. hit it again Saturday Thanks for the reply. Slickfoot

08-15-2015, 12:05 AM	#10
Eman Member Join Date: May 2014 Location: E TN Posts: 473 Likes: 16 Liked 133 Times in 76 Posts	Re: How to get brake pedal out of 89 Mustang I've been able to just remove the bolt but it's probably easier to remove the whole quadrant. If you remove it all it makes it easy to mock it all up including mounting the MC. You can make a guide for the brake rod and weld it in so it would be impossible for it to pull out of MC and fall down. I've also mocked it all up and bled the MC by pushing the pedal while it's all in a vise, much easier. For a stop you can weld a piece of tubing at an angle and use a bolt in it with nuts on either end of the tubing as an adjustment.