I heard various combat vehicules, IRL, and I can assure you that the wheeled fleet like the LAV25, Striker, LAV III don't squeak/. It's more like city bus sound, with a little more roar, all you hear is the engine being punished. Squeaking comes from heavy tracked vehicules, such a Leo tanks, M113, Bradleys, Abrahms etc... For what I can from my past experience, all you hear from the Leo at a distance, is the terrifying loud and heavy rumble from the massive diesel engine. The grounds actually tremble. The tracks squeaks are heard from a relatively short distance, less than 300m.
Pit