If I've missed something in hydraulics class, please educate me.
it does not use hydrolics at all, just cables
Yup, it's cable operated, no hydraulics to it.
Actually, it's called an emergency brake, not a parking brake. If your hydraulic brakes fail completely, the E-brake will stop you.
I don't understand how the parking brake or any other preload can work. None of the brakes will grab untill the pressure is equal, or proportionally equal in all four, reguardless of how close or far the pads or shoes are from the rotor or drum. If I've missed something in hydraulics class, please educate me.
Actually its called a parking brake...
I defer this one to Wikipedia:
The most common use for an automobile emergency brake is to keep the vehicle motionless when it is parked, thus the alternative name, parking brake.
http://en.wikipedia.org/wiki/Parking_brake
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I had one freeze once and that was plenty, so I don't use them.
front brakes are 70% of the total braking force, and the rear 30%
so that is a big reason rears last longer.
There is more momentum and weight on the front axle, therefore more braking pressure.
Must be a corvair thing. I had a 67 Chevelle and it had a powerglide.I had a couple of Corvair Powerglide power trains in VW busses. That tranny did not have Park, so the parking brake was mandatory (and stuck occasionally, even in FL).
My guess is that all powerglide and maybe some other early automatics lacked Park.
I still use it, but only when stopped on an incline.