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Click on image for the lowdown. 
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| | | Forums66 Topics128,038 Posts1,055,585 Members48,426 | | 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: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | If you turn a drum (or rotor) on the hub, it ensures that the surfaces are parallel to the motion of the wheel - I'm not sure if it does much on drums, but it reduces vibration on discs. | | |
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