In Euro Truck Simulator 2 (ETS2), the retarder is a crucial auxiliary braking system designed to slow down the drive shaft from the transmission to the rear axle, effectively assisting in controlling the truck's speed, especially with heavy loads or on long downhill stretches, without relying solely on the primary service brakes.
Understanding the Retarder's Role
For heavy vehicles like the trucks in ETS2, managing speed, particularly on long descents, is vital for safety and vehicle longevity. The retarder serves as an additional braking mechanism that works independently of the traditional friction-based service brakes. Its primary purpose is to maintain a controlled speed and prevent the service brakes from overheating and experiencing brake fade, a dangerous condition where braking effectiveness diminishes significantly due to excessive heat.
How the Retarder Works in ETS2
The retarder operates by creating internal resistance within the drivetrain, specifically targeting the rotation of the drive shaft. This resistance translates into a powerful braking force that helps to decelerate the truck.
Activating and Using the Retarder
In ETS2, activating and using the retarder is straightforward:
- Dedicated Controls: Most modern trucks in ETS2 are equipped with retarders, which can be activated using dedicated key binds on your keyboard or buttons on your steering wheel peripheral.
- Multiple Stages: Retarders typically offer multiple levels or stages of braking power. Players can incrementally increase or decrease the retardation strength as needed, providing fine control over the vehicle's speed.
- Combined Use: The retarder can be used in conjunction with the engine brake (another auxiliary braking system) for maximum braking power on extremely steep grades, or independently for more moderate speed control.
Benefits of Using a Retarder in ETS2
Utilizing the retarder offers several significant advantages in ETS2 gameplay, mirroring real-world trucking benefits:
- Reduces Wear on Service Brakes: By taking the brunt of sustained braking, the retarder prevents the main brake pads and discs/drums from overheating, preserving their effectiveness and reducing costly virtual repairs.
- Increased Safety and Control: On steep downhill gradients, the retarder helps maintain a stable and safe speed, preventing the truck from gaining excessive momentum, which can lead to loss of control or accidents.
- Improved Driving Experience: It adds to the realism and depth of the truck simulation, making the driving experience more authentic and challenging in a rewarding way.
- Better Fuel Economy: By maintaining speed more efficiently downhill, you might reduce the need to accelerate as much on the flatter sections, indirectly contributing to better fuel consumption.
Retarder vs. Engine Brake vs. Service Brakes
Understanding the differences between the various braking systems is crucial for effective driving in ETS2:
| Feature | Retarder | Engine Brake | Service Brakes (Foot Brake) |
|---|---|---|---|
| Mechanism | Slows drive shaft rotation using fluid/magnetic resistance | Uses engine compression to slow crankshaft | Friction on wheels (pads/discs or shoes/drums) |
| Effectiveness | Very strong, consistent braking, especially for heavy loads | Moderate, dependent on engine RPM and gear | Very strong for quick stops, prone to fading |
| Wear | Minimal mechanical wear on physical components | Minimal mechanical wear on engine components | Significant wear on pads/discs/drums |
| Usage | Long descents, sustained speed control | Long descents, gradual speed reduction | Emergency stops, coming to a complete halt |
Practical Tips for Using the Retarder in ETS2
To master the use of the retarder and enhance your trucking experience:
- Anticipate Descens: Start applying the retarder before your truck gains too much speed on a downhill slope. It's easier to maintain speed than to dramatically reduce it.
- Use in Stages: Don't apply maximum retardation immediately unless absolutely necessary. Start with lower stages and increase the power gradually as needed to maintain your desired speed.
- Combine if Needed: On extremely steep or long descents, engage both the retarder and the engine brake for maximum control and speed management.
- Monitor Speed: Always keep an eye on your speedometer and the road conditions. The goal is to maintain a safe, controlled speed without over-braking or under-braking.
- Avoid Over-Reliance on Service Brakes: Use the foot brake only for coming to a complete stop, navigating tight turns, or emergency situations. Rely on the retarder for sustained speed control to prevent brake fade.
