The keyword "full" implies a complete garage. Here is the breakdown of what you get when you own the full suite:
The MudRunner community is active and creative, with many players creating and sharing their own mods. These mods can range from new vehicles and maps to entirely new gameplay mechanics, extending the game's replayability. mudrunner full
To experience you must conquer Grizzly Creek with the Western Star 6900XD (which cannot equip a diff locker, making it a drift machine on ice). The keyword "full" implies a complete garage