1967 mustang front drum fade/pull?

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westu37
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1967 mustang front drum fade/pull?

Post #1 by westu37 » Tue May 02, 2017 10:02 pm

Hello all,

I'm a younger guy who grew up with disc brakes.

I just want to verify that it is reasonable that brake pull on the fronts, and fade are part of the norm on front drum systems.

Also is it normal to have a pull to the right during one stop and then it pull to the left a few minutes later?

I'm under the impression that this is kind of normal for drum brakes but want to make sure.

Wes

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bubba22349
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Re: 1967 mustang front drum fade/pull?

Post #2 by bubba22349 » Wed May 03, 2017 12:24 am

westu37 wrote:Hello all,

I'm a younger guy who grew up with disc brakes.

I just want to verify that it is reasonable that brake pull on the fronts, and fade are part of the norm on front drum systems.

Also is it normal to have a pull to the right during one stop and then it pull to the left a few minutes later?

I'm under the impression that this is kind of normal for drum brakes but want to make sure.

Wes


Hi Wes, no it isn't normal for drum brakes to pull or for them to pull right and then left a few minutes later. Pulling can be caused by a number of issues that can be corrected by adjustments to the tightness of the shoes against the drums matches closely for each side if they are manual adjusters (this is usually automatic with the factory self adjusters). Other causes are out of round drums, worn out brake hardware, and the brake backing plates being worn on the slide pads. All these items can be repaired to bring the drum brakes back into perfect working order.

Drum brake fade though is possible this is after a number of very hard (Panic) stops in a row due to the heat build up. This can be improved on by making sure that the shoes are not dragging excessively, with better quality brake shoe materials, and or by adding holes or air ducks to help in faster cooling. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: 1967 mustang front drum fade/pull?

Post #3 by mustang6 » Wed May 03, 2017 2:36 am

I second everything that Bubba said with a couple of extra points-

They should not pull at all, and if you do all the adjustments, parts checks (wheel cylinders, linings, drums, etc) and can find nothing else wrong, consider the flexible brake hoses behind the backing plates. When they get old and deteriorate inside they get constricted and don't pass fluid well. So stepping on the brake causes a pull in the direction of the better hose (as that wheel cylinder gets immediate full pressure), followed by pulling by the other side when letting off the brakes (the bad hose slows the release of pressure). Bad alignment and worn front end components can amplify the effects too.

As far as fade goes, my experience has been its not too bad on V8 drum brakes but the early smaller 6 cylinder brakes can fade fast. Better shoe linings can help a little bit but now you see why so many six cylinder owners are interested in front disk brake conversions.
Scott

68 Mustang 200 ci, Aussie 250-2V head, Dual Headers, Comp Cams 252H, DSII w/MSD 6AL, T-5, V8 suspension.

65 Ranchero 200 ci, late 170 head, Autolite 1101, 3.03 3 speed, Maverick 8" 4 lug rear with 3.55 gears.

westu37
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Re: 1967 mustang front drum fade/pull?

Post #4 by westu37 » Wed May 03, 2017 7:16 am

I'm pulling the fronts today and will inspect the wheel cyl., hoses and linings.

I dont feel a pulsing or throbbing brake, so I dont thing the drums are heat spotted or out of round.

I suspect the shoes are glazed or not the same radius of the drums, especially the LF

Wes

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Re: 1967 mustang front drum fade/pull?

Post #5 by ags290 » Wed May 03, 2017 2:02 pm

I would also check your wheel bearings while you are there to make sure they are evenly torqued left to right
Kevin
Early 1965 Mustang with a 170

westu37
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Re: 1967 mustang front drum fade/pull?

Post #6 by westu37 » Thu May 04, 2017 7:38 am

UPDATE:

Pulled both fronts. The guy I bought the car from is correct. The brakes are new, but I believe they were done about 3 1/2-4 years ago and sat.

The wheel cylinders are weeping and it looks a little rusty. I guess I had moisture in the system at one point.

I'm replacing the cylinders and the front hoses. The markings on the hoses are faded, and ounce of prevention.

The front bearings are free of dirt/particles/water etc. Clean fresh grease. Smooth and shiny spindle, so all is good there.

The shoes, and hardware still look new. The drums resurfaced. I'll clean the drum surfaces and scuff the shoes for a fresh bite, but It looks like the wheel cyl. and hoses should do the trick.

Wes

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bubba22349
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Re: 1967 mustang front drum fade/pull?

Post #7 by bubba22349 » Fri May 12, 2017 2:09 am

Often the wheel cylinders can be honed and a kit installed NAPA has great brake kit parts. Be sure to check over the backing plates good or take few close up pictures of them and post. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: 1967 mustang front drum fade/pull?

Post #8 by wsa111 » Fri May 12, 2017 9:06 pm

You can use V-8 hubs & go up to 10" drums on the front. 67 spindles will accept both. They are 5 lug though. Possibly 70 Mavericks hubs are 4 lug design. You could have a machine shop convert the 5 lug to 4 lug.
You need V-8 backing plates, shoes, wheel cylinders & hardware.
I have this on my 67, but also have the 8" rear which also has 10" drums. Go with power brakes & for average driving I see no reason to go disc brakes. Depends how you intend to drive your ride.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, HEI dist. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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Re: 1967 mustang front drum fade/pull?

Post #9 by B RON CO » Sat May 13, 2017 9:37 am

Hi, X2. Also make sure the small primary shoe is in front, and the large secondary shoe is in the rear. It is common to mix that up. Some people don't notice the difference. Your problem was probably the wheel cylinders. Good luck
B RON CO. Still workin' on it!

1933 Ford Pickup - 59A Flathead V8
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1966 Ford Mustang - 289 V8

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