| A part of a clutch that receives the driving motion from the flywheel pressure plate assembly transmits the motion to the transmission input shaft. | |
| Alternating current | |
| In an automatic transmission, a device used to prevent members of the planetary gearset from rotating. | |
| The heat exchanger used in the A/C system, in which low-pressure refrigerant flows and changes state, absorbing heat from the surrounding air. |