karasmer Posted May 1, 2013 Share Posted May 1, 2013 I must be missing something but why on earth did automakers and they still do go with drum brakes, they can not be cheaper to make with all the parts involved. I just think of this every time I have to do a rear break job which really sucks compared to front discs. Link to comment Share on other sites More sharing options...
Guest Oldengineer Posted May 1, 2013 Share Posted May 1, 2013 Drum brakes still show up on the rears because of the cost of the parking brake is cheaper. Cars with rear disc brakes typically use a cable and lever operated screw mechanism to ratchet out the calper's piston or incorporate a small cable operated drum brake assembly that works on a brake drum incorporated into the rear rotors. Regards:Oldengineer Link to comment Share on other sites More sharing options...
joe_padavano Posted May 1, 2013 Share Posted May 1, 2013 Automakers originally used drum brakes because they are self-energizing. This lessened the force required to actuate them, which was important until power brakes became commonplace. Disk brakes are not self-energizing. Link to comment Share on other sites More sharing options...
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