ASE Auto Maintenance and Light Repair
Terms & Definitions
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Disc brake rotor
In a manual transmission, part of the synchronizer assembly. A brass ring that brings the driven gear to shaft speed before engagement.
A cast iron disc mounted on the wheel hub, which is plant by the caliper disc brake pads to slow stop its rotation.
Flexible, impermeable membrane on which pressure at to produce mechanical movement; in automotive terminology, any disc shaped device; can be as diverse as thin membranes that separate two chambers and a component, and large metal disc that activate clutch pressure plate.