88 Mustang GT 5 lug / disc conversion (almost done!) parking brake question

Red50Fox

Active Member
May 6, 2019
122
11
28
63
Massachusetts
Afternoon all.
Well, my 5 lug SN95 disc conversion is almost complete. Just to set the stage, I have an 88 GT 5.0 Automatic Convertible and this weekend I (with the assistance of a couple of younger guys to help with the heavy lifting) swapped in a 5 lug 8.8 axle with 3.73 gears and trac-loc, new upper and lower control arms, and new springs and isolators The axles are Ranger axles with the appropriate brackets for 1994 GT brakes (discs and calipers). In the front, powder coated lower arms (stock) with new bushings and sn95 ball joints. New springs and isolators, struts, inner and outer tie rods. SN95 spindles, hubs, rotors and calipers from the same 1994 GT. Replaced rear hard and soft brake lines and probably a couple of other things that slipped my mind. Tires and wheels 17" split 5 or 10 spoke (GT) wheels with Hankook P245s on the rear and P235s on the front.

Still need to install rear sway bar, hang the exhaust, bolt up the drive shaft, do an eyeball front end alignment (so I can drive it to the alignment shop) swap out the brake booster (mostly from the same 1994 GT) and a number of other odds and ends.

So, after all that... Parking brakes! I had the handbrake "fixed" cut the spring and tab. Welded the stops (then I saw a post here for a part that I could have just bolted on (who knew?)) I bought the short center brake cable that goes to the tee and cables for an SN95 parking brake set up. I also bought brake cables for a 1994 GT (This is where my problem lies, I'm sure of it). I re-read the ford racing document on the 5 lug / disc swap and found that I should have bought either 87-92 fox with rear disc (M-2809-A) or 93 cobra with rear disc (F3ZZ-2A635-A) cable, which I did today. I also bought the 93 cobra bracket that goes into the tunnel, which I'm not sure that I need.

Here is my question (Finally!) What, parts do I need to finish up the parking brake set up? I'm pretty sure the 94 gt cables are wrong. Of the cables I ordered today, which, in your opinions, are the correct ones? Most importantly, do I run the new parking brake cables in the same manner that the original ones were? Yes, I do have the cable guides that bolt to the rear sway bar.

Any help is appreciated.

Thanks
 
  • Sponsors(?)


KRUISR

Active Member
Apr 16, 2015
235
69
38
50
I used 94/95 V6 rear cables. Routed them basically the same as stock. With these cables you will need to install a front mount bracket from an SN95.

IMG_0443.JPG

You need the bracket the cables connect into. The one on the right with the big rivet is not needed but can help hold cables away from driveshaft (on a lowered car). I fabbed my own that closely replicates the needed bracket. I then zip tied the cables to the factory football brackets (that the OEM cable would curve in).

An alternative to modifying the Fox handbrake is use a 94-04 hand brake and modify the rear mount tab (cut off and move forward about an inch and reweld). Then you have a factory spring intended for rear disc cables.
 

mikestang63

SN Certified Technician
Aug 27, 2012
9,901
6,685
204
In the garage
There is a sticky on brake upgrades that has everything you need to know
You will need
  • adjustable proportioning valve
  • Gut the stock proportioning valve and use the MM plug
  • 3 to 2 brake line kit for the stock gutted prop valve to the new SN95 master cylinder
  • You can try and see if your stock booster work.. some have gotten lucky others needed to use the 93 cobra booster
 

Red50Fox

Active Member
May 6, 2019
122
11
28
63
Massachusetts
Thanks for the assist on this. Got the right cables and all is good with e-brakes, other than an adjustment. Now I have a new issue. I moved the car this morning and cleaned up underneath it. I left it where it was for a while. Doing a few things around the car and I notice the brake lights are on. Not sure about anything on the dash but the rear lights were on. The fluid level conn. is not connected to the master cylinder, not sure if it matters right now. Could it be a defective brake light switch?
 

Red50Fox

Active Member
May 6, 2019
122
11
28
63
Massachusetts
Wow... I really feel like a "genius" right now. It sounds so simple when you say it :confused: not sure why that never crossed my mind.

Thanks
 

Red50Fox

Active Member
May 6, 2019
122
11
28
63
Massachusetts
I pulled up on the brake pedal and the lights went out. Something seemed "sticky" when I pulled up on the pedal. I'm sure there are some grease points I should address. I bought a new switch might as well use it. Since @General karthief mentioned pulling up on the pedal, what does that indicate? Bad Switch?

Please let me know
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
16,955
5,423
193
polk county florida
I've seen a bad switch do that, also have seen the hole on the push rod worn out too.
And I will add to look at the play between the pedal and the booster if it was swapped out.
 

TOOLOW91

If you're the village idiot what's that make me?
15 Year Member
Nov 29, 1999
7,335
7,147
234
S.I.NY
Sounds to me like the switch may not be on the pin that goes through the pedal rod the right way . If it isn’t locked in place it will move and leave the lights on the second you touch the pedal
 

Mustang5L5

i'm familiar with penetration
Mod Dude
Feb 18, 2001
33,096
9,229
224
Massachusetts
If the switch isn't installed exactly right, it will do exactly what is being described. The orieitation and spacers needs to be correct.
 

Red50Fox

Active Member
May 6, 2019
122
11
28
63
Massachusetts
Ok, I'll check out how the switch was installed tomorrow. I'll need to check out if it's binding. @General karthief mentioned play between the booster and pedal. Am I looking for too much or too little play? What is correct?

Thanks for the info.
 
Thread starter Similar threads Forum Replies Date
R WTB/Trade looking for axel that will drop into my 1988 mustang with disc and 5 lug 8.8 SN95 Mustangs For Sale (1994-04) 0
Jarrod@latemodel Brakes Mustang Sve 5 Lug Disc Brake Conversion: Part 3 Fox 5.0 Mustang Tech 0
Blown331LX 1990 Mustang GT, 306, H/C/I, 5 lug 4 wheel disc, 18"s, New everything Fox Body Mustangs For Sale (1979-93) 0
mustang863 93 MUSTANG SVT COBRA 4-LUG 8.8 3.55 DISC BRAKE AXLE COMPLETE SWAP - $800 Drivetrain Parts 2
Blown331LX 1990 Mustang GT. 306, 5spd, 5 lug, 4 wheel disc, $15,000 invested, F/S or trade Fox Body Mustangs For Sale (1979-93) 0
chepsk8 Needed: Fox Mustang with 5-Lug & $-Wheel Discs in Easton PA for Magazine Article Fox 5.0 Mustang Tech 13
Hollywood_Vae Wheels-Tires Rear Tires rubbing 1994 - 1995 Specific Tech 4
L Fox body ecu harness problems Fox 5.0 Mustang Tech 5
S Anyone try these OEM 2017 Mustang wheels on their 5-lug Fox? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
Sabretooth Brakes 5-Lug Converted Brakes / Parts - ID Help! Fox 5.0 Mustang Tech 44
wobbyguy Looking For Rims For 5 Lug Swap On 87 Mustang 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
D 93 Mustang Fuel Gauge Not Working Fox 5.0 Mustang Tech 8
gruvee87vertgt Help/mustang Down, 5 Lug Axles Too Long? Not Fitting Correctly Fox 5.0 Mustang Tech 17
G SOLD 1992 Mustang Rear Axle-complete 5 Lug Drivetrain Parts 0
JustinGT Suspension 86 Mustang Gt 5 Lug Questions Fox 5.0 Mustang Tech 0
C 90 Mark Vii Air Suspension In A 83 Mustang ??? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
M 1967 Rear End Classic Mustang Specific Tech 2
A 1990 Mustang Wheels And Tires...5 Lug 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
A 2016 Mustang Eco Wheel Lug Lock Problem 2015+ (S550) Mustang -General/Talk 2
P SOLD 17 X 8 And 17 X10 Ponys For 4 Lug Mustang Wheels Tires Brakes 0
tacomatrx450f Expired 79-93 Saleen, Cobra R, Mustang 5 Lug Rear Disk Conversion Kit Wheels Tires Brakes 0
D 91 Mustang 5.0 Lx Want To Install 96-04 Spindle 5 Lug Conversion Fox 5.0 Mustang Tech 2
tacomatrx450f Expired 79 - 93 Mustang Cobra, Turbo Coupe 8.8 Axle With Sn95 5 Lug Disk Brakes Drivetrain Parts 3
tacomatrx450f Expired 79 - 93 Mustang Cobra, Turbo Coupe 8.8 Axle With Sn95 5 Lug Disk Brakes Drivetrain Parts 3
H Expired New Ssbc 1987-92 Mustang 4-lug Rear Disk Brake Conversion Kit Wheels Tires Brakes 1
6 5 Lug V8 Falcon/mustang Drums & Spindles Suspension 5
50sleeper Mustang GT Wheels 17x8 5 Lug Rims and Tires Midwest Wisconsin Wheels Tires Brakes 0
T Four Mustang 8” x 15” 10 hole 4 lug aluminum wheels for sale - polished Wheels Tires Brakes 3
3 Expired Bogart Fly Star 4 lug rims Mustang Wheels Tires Brakes 2
M Black 4 lug Mustang Wheels Wheels Tires Brakes 4
Undisputed I need a pair of 16” 5 lug Mustang wheels for my car!! Anyone have any?!?! 94+ Up 16" 2005 - 2014 S-197 Mustang -General/Talk- 0
My95.0L Weld Prostars & MT DR's for 5 lug Mustang in Ponchatoula, LA Wheels Tires Brakes 1
My95.0L Weld Racing Prostars & Mickey Thompson DR's for 5 lug Mustang Wheels Tires Brakes 2
89blackbetty Mustang pony wheels/tires 16" 4 lug EXCELLENT SHAPE!!! Wheels Tires Brakes 11
9 which rotors for 5 lug conversion on a 90 mustang Fox 5.0 Mustang Tech 4
M mustang 5 lug Fox 5.0 Mustang Tech 3
J looking for 66 mustang 8 inch 5 lug rear end Engine and Power Adder 1
M FREE 1967-68 mustang 8 inch housing and 5 lug axles Engine and Power Adder 1
degins 4 lug FOX Mustang wheels 2.3L (N/A & Turbo) Tech 2
N 1966 Mustang 4 to 5 lug Conversion Classic Mustang Specific Tech 7
stackz bullit wheels on 87 mustang w/lug conversion fitment question? Fox 5.0 Mustang Tech 30
S 99 mustang 5 lug axles Fox 5.0 Mustang Tech 2
flymikemc Lightweight lug nuts for mustang Fox 5.0 Mustang Tech 41
TurboXstang 76 Mustang II 5 lug conversion? 1974 - 1978 Mustang II Talk & Tech 14
mustang_mattie Mustang + Ranger = 5 lugs! 1974 - 1978 Mustang II Talk & Tech 5
N 67 mustang dash lights not working 1965 - 1973 Classic Mustangs -General/Talk- 0
G 1991 mustang engine compartment restore 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
U What's it Worth? 67 Ford Mustang Thermactor Smog System What is it Worth?!?!? 1
G Hello From Socal 1996 - 2004 SN95 Mustang -General/Talk- 0
L Clutch brake pedal problems 1965 Mustang Classic Mustang Specific Tech 3
Similar threads