Wiktionary
n. A mechanism which changes gears in a car.
Usage examples of "gear change".
I held my breath and listened intently and heard it again - the faraway metallic grunt of a gear change.
Then Benedetta's hand tightened on his arm as she heard, far away, the characteristic sound of a gear change.
The gear change was stiff and it took both hands to jam the lever into reverse.
As he made a gear change, accelerating toward escape, he could see Chaim in his outside rearview, dutifully tow.
As he made a gear change, accelerating toward escape, he could see Chaim in his outside rearview, dutifully towing the decrepit mobile home into position to block immediate pursuit along the access road.
Dad had put his mug down when the immense and empty silence around them was broken by the gear change of the truck nosing down to cross the dry riverbed.