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Click on image for the lowdown. 
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| | | Forums66 Topics128,101 Posts1,056,175 Members48,436 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | When there is no hydraulic pressure on the pad it is not pushing
on the disc so there is very little friction between the two.
The disc cools down quite rapidly when the friction is reduced
therefore it shrinks a few thousands creating a clearance.
dg
Denny G
Sandwich, IL
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