My '91 318is and my '89 Camry have rear discs that work like the F150's - small
drum cast into the rear disc in which resides parking brake shoes. '91-'98
Saturns (and others, I'm sure) had a rear caliper piston with a screw thread on
it, so that pulling on the handbrake cable turned the piston and squeezed the
disc. I guess the screw thread was pitched such that fluid pressure would push
and rotate the piston out in "normal" braking. Apparently either GM figured it
out or stole it from somebody...
-=Chris
Chris King - cbking@alum.rpi.edu
http://mywebpages.comcast.net/kvcbk/
---------- Original Message ----------------------------------
From Mike MacLean <macleans at earthlink.net>
Date: Tue, 15 Apr 2003 20:30:56 -0700
>The disc brakes on my F150 have a combination rotor drum for this purpose. The
>emergency brake drum is on the inside center of the rotor. The shoes are
>activated mechanically.
>Mike MacLean-60 Sprite
>
>Larry Macy wrote:
>
>> Sorta the same but a bit off topic. This question makes me wonder a bit
>> about 4 wheel disc brakes. My Dakota has them. I seem to recall a
>> discussion a long time ago that Chevy still used drums on the rear of
>> the 'Vette because nobody had figured out how to make a disc brake
>> parking brake release. They could figure out how to apply them, just
>> not release.
>>
>> So what changed from about 20 years ago??
>>
>> Larry
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