The Acura TLX is equipped with the innovative Super Handling All-Wheel Drive (SH-AWD) system, a technology engineered to significantly enhance cornering performance and overall driving dynamics. This sophisticated drivetrain is more than just a conventional all-wheel-drive setup; it actively manages torque distribution to maximize traction, stability, and agility. By understanding how SH-AWD operates and how to harness its capabilities, drivers can enjoy a more confident, engaging, and safer driving experience—especially on winding roads, during spirited driving, or in challenging weather conditions.

What is Acura SH-AWD?

Super Handling All-Wheel Drive (SH-AWD) is an advanced torque vectoring all-wheel-drive system developed by Acura. Unlike traditional AWD systems that primarily split power between front and rear axles, SH-AWD takes a more dynamic approach by also distributing torque between the left and right rear wheels. This lateral torque vectoring is key to its superior handling characteristics.

The system employs a series of electronically controlled multi-plate clutch packs and sensors that continuously monitor vehicle speed, steering angle, lateral G-forces, throttle input, and wheel slip. Based on this data, SH-AWD actively adjusts torque distribution not only front-to-rear but also side-to-side at the rear axle. This intelligent distribution helps the TLX maintain optimal grip and balance when cornering, accelerating, or navigating slippery surfaces.

The SH-AWD system is integrated seamlessly with the TLX’s Vehicle Stability Assist (VSA), traction control, and other chassis control modules, creating a holistic approach to vehicle dynamics. This integration allows the TLX to respond proactively to driver inputs and road conditions, improving both performance and safety.

Technical Components of SH-AWD

  • Center Differential: Manages torque split between front and rear axles, typically favoring front-wheel drive under light throttle but capable of sending up to 70% of power to the rear wheels when needed.
  • Rear Differential with Torque Vectoring: Equipped with an electronically controlled multi-plate clutch system that can vary torque between the left and right rear wheels independently.
  • Drive-by-Wire Throttle and Steering Sensors: Provide real-time data to adjust torque distribution dynamically based on driving demands.

How SH-AWD Enhances Cornering

The hallmark of SH-AWD’s design is its ability to enhance cornering by actively pushing the car through turns rather than merely managing grip. This is accomplished by increasing torque to the outside rear wheel during cornering, which creates a yaw moment that helps rotate the vehicle in the direction of the turn. This effect is often referred to as “torque vectoring” and is a key factor in reducing understeer and improving agility.

When entering a corner, inertia naturally causes weight to shift to the outside wheels. SH-AWD senses this dynamic and sends additional torque to the outside rear wheel, which helps “pull” the car around the bend. This reduces the need for excessive steering input and enhances the feeling of precision and control.

Moreover, SH-AWD improves traction under acceleration out of corners by distributing power optimally between all four wheels. This ensures that the TLX maintains its line with minimal wheel slip, enhancing acceleration stability and driver confidence.

Real-World Benefits of SH-AWD in Cornering

  • Improved Handling Balance: By mitigating understeer and providing more neutral steering feel, the TLX feels more agile and responsive.
  • Enhanced Stability: Torque vectoring helps maintain vehicle composure even on uneven or slippery surfaces.
  • Better Traction: Optimized power delivery prevents wheel spin and maximizes grip during spirited driving or adverse weather.
  • Increased Driver Confidence: The system’s ability to adjust torque seamlessly allows the driver to push the car closer to its limits safely.

How to Leverage SH-AWD for Superior Cornering

While SH-AWD operates automatically, drivers can maximize its benefits by adopting specific driving techniques and understanding the system’s behavior. Here are some practical tips to help TLX owners harness SH-AWD for the best cornering performance:

1. Enter Corners Smoothly

A smooth approach to corner entry allows SH-AWD to optimally manage torque distribution. Sudden or jerky steering inputs can disrupt the system’s ability to balance torque effectively. Gradual steering helps the system predict the vehicle’s trajectory, enabling it to send the right amount of torque to the outside rear wheel at the correct time.

2. Maintain Steady Throttle Application

Consistent throttle pressure during cornering supports SH-AWD’s torque vectoring function. Sudden throttle changes can cause torque fluctuations that may unsettle the chassis. By applying steady power, the system can better regulate torque split, improving traction and cornering balance.

3. Utilize Sport and Dynamic Drive Modes

The Acura TLX offers several driving modes such as Sport and Sport+ that alter throttle response, steering weighting, and SH-AWD intervention levels. Engaging these modes sharpens the system’s responsiveness, allowing for more aggressive torque vectoring. This results in crisper turn-in, enhanced mid-corner grip, and more engaging driving dynamics—ideal for spirited driving or track days.

4. Trust the System and Focus on Smooth Control

SH-AWD is designed to work seamlessly in the background, so there is no need to consciously “drive around” the system. Trust that it is actively managing power delivery to improve handling and stability. Instead, focus on precise steering inputs, smooth throttle modulation, and maintaining good driving lines through corners.

5. Understand the Limits of Traction

While SH-AWD significantly improves handling, it does not make the TLX invincible. Recognize that excessive speed, poor tire condition, or slippery surfaces can still overwhelm the system’s capabilities. Always adjust driving to road conditions and maintain safe speeds.

Additional Techniques to Enhance SH-AWD Performance

Optimize Tire Selection and Maintenance

The effectiveness of SH-AWD depends heavily on tire grip. Using high-performance tires suited for your driving style and environment ensures the system has maximum adhesion to work with. Regularly check tire pressures and tread depth to maintain optimal traction.

Suspension and Chassis Tuning

Modifications such as upgrading sway bars, shocks, or springs can complement SH-AWD by improving chassis balance and responsiveness. A well-tuned suspension allows the tires to maintain better contact with the road, further enhancing the benefits of torque vectoring.

Brake System Awareness

Some torque vectoring systems can also apply braking force to individual wheels to help with cornering. While SH-AWD primarily relies on torque distribution, understanding how your TLX’s braking system works in tandem with SH-AWD can help you anticipate vehicle behavior during aggressive maneuvers.

SH-AWD in Different Driving Conditions

SH-AWD shines in a variety of driving scenarios beyond just spirited cornering, providing versatile benefits in everyday and adverse conditions:

Wet or Slippery Roads

SH-AWD improves grip by actively transferring torque to wheels with the most traction, reducing wheel spin and enhancing stability. This is particularly beneficial in rain, light snow, or icy patches, helping the TLX maintain control and avoid skidding.

Highway Stability

During high-speed cruising and lane changes, SH-AWD contributes to a composed and planted feel by ensuring balanced torque distribution. This reduces the likelihood of oversteer or understeer, making freeway driving more secure and comfortable.

Acceleration and Launch Control

When accelerating from a stop or out of corners, SH-AWD maximizes traction by sending more torque to the wheels that can put power down without slipping. This results in quicker launches, reduced wheel spin, and improved overall acceleration performance.

Comparing SH-AWD to Other AWD Systems

While many automakers offer all-wheel-drive systems, SH-AWD stands out due to its proactive torque vectoring capabilities. Traditional AWD systems typically split torque front-to-rear but lack the ability to manage side-to-side torque at an individual wheel level.

For example, conventional AWD systems may send a fixed percentage of power to the rear wheels when slip is detected but do not adjust torque between left and right wheels dynamically. This can result in less precise handling and a tendency for understeer during cornering.

In contrast, SH-AWD’s ability to direct torque specifically to the outside rear wheel during a turn provides a more natural and agile driving feel. This technology places Acura’s AWD system among the most advanced in the luxury sport sedan segment.

Frequently Asked Questions About SH-AWD

Does SH-AWD Improve Fuel Efficiency?

SH-AWD is designed to be efficient by defaulting to front-wheel drive during steady cruising, which helps conserve fuel. It only engages the rear wheels and torque vectoring clutches when needed, minimizing energy loss and optimizing fuel economy without sacrificing performance.

Can SH-AWD Handle Off-Road Conditions?

While SH-AWD enhances traction on slippery surfaces like gravel or wet pavement, the TLX is primarily a sport sedan and not intended for serious off-road use. The system excels in on-road performance and light traction challenges rather than rugged off-roading.

Is SH-AWD Maintenance Intensive?

SH-AWD requires regular maintenance similar to conventional AWD systems, including periodic fluid changes for the differentials and inspection of drivetrain components. Acura recommends following the scheduled maintenance outlined in the owner’s manual to ensure optimal system performance and longevity.

Conclusion

The Acura TLX’s Super Handling All-Wheel Drive system represents a significant advancement in AWD technology, combining front-to-rear torque distribution with lateral torque vectoring to dramatically improve cornering performance and driving confidence. By understanding how SH-AWD works and employing smooth driving techniques, TLX owners can fully leverage this system to enjoy sharper handling, enhanced traction, and greater stability in a wide range of driving conditions.

Whether navigating tight canyon roads, accelerating out of curves, or simply managing wet or slick surfaces, SH-AWD offers a dynamic and intuitive driving experience that sets the TLX apart in its class. Embrace the technology, trust its capabilities, and you will discover a level of driving precision and enjoyment that is uniquely Acura.