This kind of truck was very loud and very noticable when the parking break was applied on the truck and trailer. the air hissed very loudly in a few tones depending on what one you heard but certainly nothing like what's there now. Could be done as a mod to see how it works out Coyote's Parking break sounds for ATS are a good example of good parking break sounds for these trucks Worth looking at the air break sounds as well, see zeemods
