Author Topic: 1969 mustang e brake question  (Read 1744 times)

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sixty9cobra

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1969 mustang e brake question
« on: December 17, 2024, 04:12:24 PM »
I have a 69 mustang with stock rear drums which are adjusted correctly, and the cable is tight. My driveway is downhill but not ridiculously steep. When I back out of the garage and leave it in neutral to adjust the carb or something it creeps backwards no matter how hard I step on the ebrake pedal. I use a brick to stop the creeping not very high tech. I step so hard on the ebrake that I have to step on the ebrake pedal to help pull the release handle. Am i missing something?   

Harry

cjshaker

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Re: 1969 mustang e brake question
« Reply #1 on: December 17, 2024, 04:42:44 PM »
Since the automatic adjusters are designed to work while stepping on the brakes in reverse, the effective braking isn't very good in that direction. Still, it should stop the car if pushed in hard. Only thing I can think of is if the shoes and/or drums are glazed over and not producing enough friction. Or perhaps the drums have been turned a bunch and the contact pattern on the shoes are very narrow? How does the contact pattern look on the shoes?

As a side note, which may or may not be of help, my cars braking had become somewhat lacking, which I only noticed when I started racing it and trying to slow down from 115 mph. My rotors had become glazed from 20+ years of use, but the pads still looked very good. I had my rotors turned to expose fresh meat on them, and still using the same old stock type pads, braking was massively improved. It went from making me nervous at the end of the 1/4 to having full confidence that I could stop without excessive effort. Of course that would not help if the contact pattern on your drums was minimal, but just passing it along as something to consider.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

sixty9cobra

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Re: 1969 mustang e brake question
« Reply #2 on: December 17, 2024, 04:46:55 PM »
I guess the drums could be glazed I don't think I ever changed them in the 50 yrs i had the car. They are certainly cheap enough to replace.

GerryP

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Re: 1969 mustang e brake question
« Reply #3 on: December 17, 2024, 06:42:04 PM »
While you're looking for glazing, make sure the primary shoe is on the front of the assembly.  The primary shoe is the smaller one and is the one that self-energizes the force the shoes can apply.

70tp

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Re: 1969 mustang e brake question
« Reply #4 on: December 17, 2024, 06:43:59 PM »
Some brake lining is too hard .   It lasts forever but won’t stop .   

Stangman

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Re: 1969 mustang e brake question
« Reply #5 on: December 17, 2024, 11:13:35 PM »
When you pull the brake are you at the end of your throw when you pull the lever.
If you jack it up and set brake can you turn the wheels. Maybe you think the rears are in adjustment but they aren’t.

galaxiex

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Re: 1969 mustang e brake question
« Reply #6 on: December 17, 2024, 11:56:45 PM »
Try pushing firmly on the normal brake pedal and while holding it, then set the ebrake.
Every 20 minute job is 1 broken bolt away from becoming a 3 day ordeal.

gregb

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Re: 1969 mustang e brake question
« Reply #7 on: December 18, 2024, 10:17:43 AM »
I think your rear brakes aren't adjusted as tight as they should be, on mine it holds the car fine, can only push it about halfway down.  All the components are newish, even the cables. Maybe try tightening the assembly where the cables meet, and give the star wheel on the adjuster a couple clicks on each side......

My427stang

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Re: 1969 mustang e brake question
« Reply #8 on: December 18, 2024, 10:50:02 AM »
I think your rear brakes aren't adjusted as tight as they should be, on mine it holds the car fine, can only push it about halfway down.  All the components are newish, even the cables. Maybe try tightening the assembly where the cables meet, and give the star wheel on the adjuster a couple clicks on each side......

Same here
---------------------------------
Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

sixty9cobra

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Re: 1969 mustang e brake question
« Reply #9 on: January 06, 2025, 01:39:20 PM »
Hi guys I finally had a chance to pull a rear tire and look at the brakes. Both shoes appear to be the same size, it was suggested to make sure the small shoe is in front. I had to back off the adjustment to get the drum off there was very little ridge. In my opinion they were adjusted properly. Cable is tight there is little pedal travel possibly not enough. Drums do look glazed. I ordered new drums and shoes lets take it from there. I cant remember ever changing the drums and I have had the car for 50 yrs. Stay tuned lol.

66FAIRLANE

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Re: 1969 mustang e brake question
« Reply #10 on: January 06, 2025, 07:30:18 PM »
If both shoes are the same size then maybe someone put both fronts on one side and both rears on the other?

sixty9cobra

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Re: 1969 mustang e brake question
« Reply #11 on: January 06, 2025, 08:13:16 PM »
that is a possibility that would probably be me messing it up. We will find out when tha new stuff arrives. I also will inspect the cables that have and outer sheathing it occurred to me that it maybe causing resistance.