• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Brake Fluid Leak

  • Thread starter Thread starter RangerJoe
  • Start date Start date Aug 4, 2011

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Aug 4, 2011
#1
  • Aug 4, 2011
  • #1
1993 GT, stock 4 lug brakes. I am leaking brake fluid from the area where the master cylinder and brake booster meet up. I believe this is because of a bad gasket, which only cost about $6 at the parts store. Is this generally what causes this?

Also, I really hate to replace the master cylinder because I want to do a 5 lug disc conversion sometime in the next year. If this repair does require a new master cylinder or brake booster, is it possible to use a SN95 setup with the stock 4 lug disk/drum setup?

Thanks in advance!
Joe
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Aug 4, 2011
#2
  • Aug 4, 2011
  • #2
TTT
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,367
18,114
224
Massachusetts
Aug 4, 2011
#3
  • Aug 4, 2011
  • #3
RangerJoe said:
1993 GT, stock 4 lug brakes. I am leaking brake fluid from the area where the master cylinder and brake booster meet up. I believe this is because of a bad gasket, which only cost about $6 at the parts store. Is this generally what causes this?

Also, I really hate to replace the master cylinder because I want to do a 5 lug disc conversion sometime in the next year. If this repair does require a new master cylinder or brake booster, is it possible to use a SN95 setup with the stock 4 lug disk/drum setup?

Thanks in advance!
Joe
Click to expand...


There is no gasket, there are internal o-rings. You need to rebuild or replace the master cylinder.

No, you can't use sn95 master now. The MC is directly sized to the caliper piston surface area on the car. A 4-wheel disk MC on a car with rear drums will result in a very hard pedal
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Aug 4, 2011
#4
  • Aug 4, 2011
  • #4
Well, that answers my question. Thanks.
 
You must log in or register to reply here.

Similar threads

B
68 manual disc/drum master cylinder
  • Butchd88
  • May 27, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
0
Views
123
1965 - 1973 Classic Mustangs -General/Talk- May 27, 2026
Butchd88
B
Brakes FOX BRAKES ISSUES
  • PonyGTrider
  • Jan 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
53
Views
3K
Fox 5.0 Mustang Tech Jan 31, 2026
Mustang5L5
J
Wheels-Tires Need Some Help - Brakes Upgrade/Wheel fitment
  • jaygee15
  • Dec 8, 2025
  • Fox 5.0 Mustang Tech
  • 3 4 5
Replies
85
Views
4K
Fox 5.0 Mustang Tech Oct 6, 2026
jaygee15
J
8
87 lx 4cyl to v8 project 4 lug disc conversion questions
  • 87lx428
  • Mar 24, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
610
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 25, 2026
87lx428
8
R
What brand brake parts for fox?
  • rwordenjr
  • Sep 18, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
9
Views
475
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 19, 2025
rwordenjr
R
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?