1) Automobile transmission
Found on
https://www.crosswordclues.com/clue/hill-holder
Any device that prevents a car from rolling backward on a hill when the brake pedal is released can be called a hill holder. The earliest hill holders were used in horse-drawn carriages and early horseless carriages. They were often home-made or made by a local blacksmith. These early hill holders were little more than a heavy iron weight with a s...
Found on
http://en.wikipedia.org/wiki/Hill-holder
A device that applies brake pressure when a vehicles clutch is disengaged.
Found on
http://www.edmunds.com/glossary/
No exact match found.
