| Anti-lock brake system | |
| And enclosure for the differential and drive axles. | |
| A device used with disc brake pads to help them from moving and making noise. | |
| A suspension device made up of a flexible bladder containing compressed air. The airspring takes the place of a conventional coil or leaf spring. Air is supplied by onboard compressor, usually with auxiliary equipment two cents vehicle height modify the pressure in the air spring as needed. |