Gearshift Ace — ruling 1

Gearshift Ace's triggered ability triggers when it becomes tapped to activate a crew ability. Even if Gearshift Ace leaves the battlefield before its triggered ability resolves, that Vehicle still gains first strike until end of turn.

Gearshift Ace : règles, fonctionnement et interactions (MTG)

Gearshift Ace is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

First strike Whenever this creature crews a Vehicle, that Vehicle gains first strike until end of turn.

How it works : Gearshift Ace

Original English text — Wizards of the Coast / Scryfall

#1September 20, 2016· Wizards of the Coast
Gearshift Ace's triggered ability triggers when it becomes tapped to activate a crew ability. Even if Gearshift Ace leaves the battlefield before its triggered ability resolves, that Vehicle still gains first strike until end of turn.
No other card is named in this ruling.