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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!
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| | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | The "lobe" on the Throw Out bearing fits the fingers on the release fork. Keeps the bearing from turning in the fork. Most friction disks that I have seen have a long small diameter center on one side and a short larger diameter on the other side. See what BC59 posted. Look at the picture that you posted. Should be clear that the larger diameter will interfere with the flywheel center if put in backwards. So in short..Long and narrow to the flywheel. Short and wide to the pressure plate. I hope that helps.
Steve H
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