With today's announcement, she has 'set the wheels in motion' for a run for the presidency. [=she has begun to run for president]
You could almost see the 'wheels' turning in his head. [=you could almost see him thinking about how to do something]
They hoped that the tax cuts would 'grease the wheels' of the economy. [=would help the economy work better]
(..) I need your clothes, your boots, and your motorcycle. You forgot to say 'please'. Take it. You can't leave and take the man's wheels, son. Now get off before I put you down. That's it, goddammit! Art David show me code at the th street bridge in Santa F' on an electrical disturbance. (..)1991 Terminator 2: Judgment Day