She said nothing in case her temper slipped out of gear.

她什么都没说，免得按捺不住情绪。

《牛津词典》

When he wanted to stop, he threw the car out of gear and braked sharply.

我要她停下来，但她停不了，我只得拉上了紧急刹车。

youdao

In this paper "out of gear all" and "all gear meshing" concepts are given.

本文给出了“全啮出”和“全啮入”的概念。

youdao

They look like an extra-large version of the World War Two jeep, but enclosed, with small blast-proof windows, a protected machine gun position on top and a variety of high-tech gear inside and out.

VOA: standard.2009.11.02

Recouping somewhat, he hit further trouble in the eighth lap when his car went out of gear.

FORBES: Risk and Reward

Another is that if you take enough load off of an air shifted Liberty transmission, it can pop out of gear into neutral, and the run is done.

FORBES: SP: Why Cadillac?

Niko Kranjcar clipped in a second but the hosts barely got out of first gear.

BBC: Tottenham 2-0 Portsmouth