| Problem | Solution | | :--- | :--- | | | Verify that you own the Idaho DLC. If you do, go to Steam → Properties → Local Files → Verify integrity. | | Western Star 49X missing from dealers | Ensure no truck mods are conflicting. Disable older truck mods. The 49X is standard in 1.39. Visit the "Kenworth" dealer to find it. | | "Incompatible save file" error | You are trying to load a save from version 1.40 or higher. Start a new profile for 1.39. | | Multiplayer (TruckersMP) doesn't work | TruckersMP requires the latest version of ATS (usually 1.48+). You cannot play on official TruckersMP with 1.39. You need a private Convoy session. | | Steam keeps auto-updating to 1.40 | Set the beta to "temporary_1_39" and in Steam Settings → Downloads → Disable "Auto-update" for that specific game. |
While the game has since progressed to version 1.58 (featuring the Route 66 rework and Driving Academy), many players still seek version 1.39 for specific mod compatibility. Official Download Method
: Players gained the ability to purchase, customize, and use their own lowboy trailers for hauling heavy and oversized cargo.
on American Truck Simulator and select Properties . Click the Betas tab on the left menu.
| Problem | Solution | | :--- | :--- | | | Verify that you own the Idaho DLC. If you do, go to Steam → Properties → Local Files → Verify integrity. | | Western Star 49X missing from dealers | Ensure no truck mods are conflicting. Disable older truck mods. The 49X is standard in 1.39. Visit the "Kenworth" dealer to find it. | | "Incompatible save file" error | You are trying to load a save from version 1.40 or higher. Start a new profile for 1.39. | | Multiplayer (TruckersMP) doesn't work | TruckersMP requires the latest version of ATS (usually 1.48+). You cannot play on official TruckersMP with 1.39. You need a private Convoy session. | | Steam keeps auto-updating to 1.40 | Set the beta to "temporary_1_39" and in Steam Settings → Downloads → Disable "Auto-update" for that specific game. |
While the game has since progressed to version 1.58 (featuring the Route 66 rework and Driving Academy), many players still seek version 1.39 for specific mod compatibility. Official Download Method american truck simulator 139 download full
: Players gained the ability to purchase, customize, and use their own lowboy trailers for hauling heavy and oversized cargo. | Problem | Solution | | :--- |
on American Truck Simulator and select Properties . Click the Betas tab on the left menu. Disable older truck mods
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