The Sound of Transformers: Age of Extinction

From Soundworks Collection, below is a vid that gets into how the sounds were created for Transformers: Age of Extinction that often came from unexpected places. For example the sound of rusted Optimus Prime truck actually came from a monster truck while Lockdown had a deliberate homage to Darth Vader. Apparently there was moments of sound used from the classic Generation One cartoon (I think they were referring to the phone ring tone).