The "sound revolution" update brought several significant additions to the trucking experience: FMOD Sound Engine

Added the ability to walk around your vehicle and trailer in the configuration screens to inspect customizations up close.

The primary distribution method for ETS2 is now Steam. Older, non-Steam versions of the game might have patches available, but for new players, Steam is the best place to get the latest, fully updated version.

If you specifically need to roll back to or stay on 1.37, go to the tab and select "temporary_1_37" from the dropdown list. 2. SCS Software Website

Version 1.37 introduced distinct sounds for different trailer types (reefer, curtain sider, tanker) and tire-road interaction based on speed and surface (asphalt vs. gravel).