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Bad brake shaking on '66 coupe

1255 Views 4 Replies 4 Participants Last post by  hawkeye18
I am rebuilding a '66 coupe with my son. When we got it, needed complete replacement of brakes. My son will be driving it so I did a complete 4 wheel brake job. The issue is when I stop the car from almost any speed, the front end vibrates violently. As you approach 0 speed, you can feel a 'grab and then release'. My first inclination was that I had bad drums. THe issue gets worse with more stops (heat related).

When I first did the brakes, I left the original master in place and have since replaced it as part of a dual reservoir/power conversion. THe problem existed prior to conversion (but after brake job). I replaced all four wheel cylinders, hardware, shoes, drums, flexible and steel brake lines.

After fighting with this for about a month I finally decided to replace the front drums (again - less than 40 miles on them). The problem went away. I drove the car for the next several days, 20-30 miles and they worked fine. After about 3 weeks, the problem has returned. The first stop of the day is fine, then once the drums heat even slightly, the vibration returns.

I've verified that the pads are installed correctly (primary shoe on front) but I can't figure this one out. Any thoughts out there?
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Man I wish my dad would build a mustang with me. :yup:
Are youbsurevthat your breaking in the pads and drums correctly by driving easy for a couple hundred miles?? If not the drums may be warping from over heating. You must be very soft on the brakes at first
I'm positive the drums are warping and causing the vibration
Ya, you do know this is the '11+ forum, right?
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