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]
(..) - Yeah, big ''badaboom''! Yeah, big boom! Big badaboom! You're lucky! This is a police control. Keep your hands on the wheel. You have an unauthorized passenger. We're going to arrest her. Thank you for cooperating. Sorry. Looks like this is your ride. (..)1997 The Fifth Element