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  #16 (permalink)  
Old 10-19-2008, 10:43 PM
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Quote:
Originally Posted by Bryan59EC
Most of the cars/trucks that I have had---

Reverse will easily overpower the e-brake
Once in Drive----you go nowhere
I always release mine before trying to move a car.

But they are called....... PARKING brakes...... not, overcome reverse brakes.

(and if your drum parking brakes won't hold a car from rolling rearward when parked on a fairly steep hill...... your brakes are fubar)

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  #17 (permalink)  
Old 10-20-2008, 08:20 AM
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Bryan,
reverse overpowers the P brake simply because R is a much lower tranny gear ratio than D and that multiples the motor TQ on the tires signifigantly...

BS numbers just to illustrate:

300ft/lbs of force x 2.46 first gear x 3.55rear gears = 2619ft/lbs of force on the P brake shoe

300ft/lbs x 3.90(?) reverse gear x 3.55 rear gears = 4153ft/lbs of force on the P brake shoe contact patch!!!!

Ripped,

check to see if you are not already at the end of the cables tightening adjustment (the funky threaded rod and nut where the cables are held by the cross piece) due to the cables are stretched or do stretch when pulled....
if yes then just add a bushing or oversized nut to act as a spacer in front of the nut against the cross piece to gain additional cables pre-tensioning tightening threads....

that will limit the handle travel alot,,,mine is fully engaged at just half the possible pull distance....

Last edited by red65mustang; 10-20-2008 at 08:38 AM.
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  #18 (permalink)  
Old 10-20-2008, 04:40 PM
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if mine does not engauge within 1/2 of the total distance on the handle/ pedal, I adjust it so it does...

and not every system is designed to work in reverse.. most do, but the particular system that Ford used on the Mustang/ falcon, at least the 6cyl 7/1/4 rears, is not designed to work in reverse.. it actully does not apply preassure in that motion. the brakes would have to be tight to begin with, for it to apply in reverse... remember Ford did have a problem with rollaway vehicles in this time period. and part of it was insufficent parking brakes.. the other part was popping out of park.
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Old 10-09-2012, 08:51 AM
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I am looking for a TRW electric Parking brake set up. It uses an additional small caliper on each rear wheel. As I understand, its very effective and you push a button on the dash to engage the brakes, pushing it again releases the brakes. To me this is new technology which has been a long time coming, cables are stone age.
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