A TrueTrac differential is a specialized type of helical gear limited-slip differential designed by Eaton. It is a purely mechanical system that enhances traction by intelligently distributing torque between the wheels on an axle. The TrueTrac does not rely on clutches, friction plates, or electronic controls, making it durable, low-maintenance, and highly reliable for a wide range of driving conditions.
How Does a TrueTrac Differential Work?
The core of the TrueTrac differential is its innovative helical gear system. This gear-based design dynamically adjusts torque distribution between the two wheels on an axle, depending on the level of grip each wheel has.
Here’s how it functions:
Normal Driving Conditions:
During regular driving, when both wheels have sufficient traction, the TrueTrac behaves like an open differential. Torque is evenly distributed to both wheels, ensuring smooth and efficient operation.Traction Loss on One Wheel:
If one wheel begins to slip (such as on ice, mud, or loose gravel), the TrueTrac automatically transfers torque to the wheel with better traction. It does this by using the resistance created within its helical gear assembly, which redirects power without any external input from the driver.
This mechanism operates seamlessly and without any abrupt engagement, providing a smooth and predictable driving experience.
Key Features of the TrueTrac Differential
The TrueTrac differential offers a range of advantages, making it a preferred choice for many drivers and vehicle applications.
Maintenance-Free Operation
Unlike traditional limited-slip differentials that use clutch packs or viscous fluids, the TrueTrac has no components that wear out over time. Its gear-based design ensures long-lasting performance with minimal maintenance needs.
Smooth and Quiet Performance
TrueTrac operates without harsh engagement or clunking noises, which are common in some locking differentials. This makes it ideal for both daily driving and performance applications.
Enhanced Traction
By automatically distributing torque to the wheel with the most grip, the TrueTrac significantly improves a vehicle’s ability to handle slippery or uneven surfaces.
Versatility
TrueTrac differentials can be used in a variety of vehicles, including passenger cars, SUVs, trucks, and even commercial vehicles. They are compatible with both front and rear axles, depending on the drivetrain configuration.
Durability
Built with high-quality materials and precision engineering, the TrueTrac is designed to withstand the rigors of heavy loads and challenging driving conditions.
TrueTrac vs. Other Types of Differentials
Understanding how the TrueTrac differs from other types of differentials highlights its unique advantages.
TrueTrac vs. Open Differential
- Open Differential: Offers no torque bias, meaning if one wheel loses traction, all the power is wasted on the slipping wheel.
- TrueTrac: Automatically redirects power to the wheel with grip, improving performance in low-traction situations.
TrueTrac vs. Clutch-Type Limited-Slip Differential
- Clutch-Type LSD: Uses friction plates, which wear out over time and require regular maintenance.
- TrueTrac: Gear-driven and maintenance-free, providing consistent performance throughout its lifespan.
TrueTrac vs. Locking Differential
- Locking Differential: Completely locks both wheels together, ensuring equal rotation regardless of traction. Great for extreme off-roading but harsh and impractical for daily driving.
- TrueTrac: Offers smooth torque transfer without fully locking, making it more versatile for mixed-use scenarios.
TrueTrac vs. Torsen Differential
- Both use helical gears, but the TrueTrac is often simpler and more affordable while delivering comparable performance in most situations.
Conclusion
In summary, the TrueTrac differential is a standout solution for drivers who value durability, performance, and ease of use. By blending advanced traction control with a robust mechanical design, it meets the demands of modern driving without the complexity or maintenance requirements of other systems. For anyone considering an upgrade, the TrueTrac is a smart, reliable, and versatile choice.
