| In a manual transmission, part of the synchronizer assembly. A brass ring that brings the driven gear to shaft speed before engagement. | |
| Engine control module | |
| A braking system that uses cast iron drums mounted to the wheel hubs. Hydraulic pressure from the brake system forces pistons in the wheel cylinder to press friction wind brake shoes against the inside of the drum, stopping its rotation. | |
| A distributionless ignition system in which spark distribution is controlled by the computer. |