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Vehicle Selector. Designed for all four seasons. All the benefits of full-time AWD. Full-time control Sending power to all four wheels gives a vehicle more grip, more predictable handling, better agility and greater control.
Full-time safety Subaru's symmetrical full-time AWD is just that - full-time. Full-time capability Rain, sleet, snow and ice have the very real potential to sideline even the best-laid plans. Full-time dependability Some AWD systems are considered overly complex and not all that reliable or economical. When demands intensify, the weaknesses of FWD become quickly apparent: Under strong acceleration, weight transfer sees the nose of the vehicle lift, which can lead to torque steer and a loss of traction In corners, FWD vehicles tend to understeer: The driver turns the wheel in the direction of the corner, but the high demands of cornering and inefficient power delivery can lead to a loss of traction and less stable, less direct cornering In slick or loose conditions, FWD can suffer greatly because all of the demands are on the front wheels for power delivery, cornering and braking - with significantly less traction available Result: A drivetrain and a vehicle that is inherently unbalanced much of the time.
However, when conditions require power to be sent to the other wheels, challenges arise: The power-splitting mechanism of the on-demand AWD system is generally limited to helping you get going when starting to accelerate in a low-traction situation When driving in slick conditions at higher speeds or on a very long and curvy road, the on-demand system can struggle to keep pace with the circumstances If conditions change suddenly, the on-demand system may not be able to react quickly enough to avoid potential hazards Result: This type of drivetrain is typically also unbalanced and limited in AWD mode when you need it most.
Here are some key differences that make full-time AWD the best choice: Full-time AWD maximizes available traction right from the start by sending power to all four wheels and maintaining power when road surfaces take a turn for the worse - this ensures high levels of control, stability and overall confidence Even in everyday driving conditions, less power is sent to each individual wheel compared to a FWD or a part-time on-demand AWD system, so the wheels are less likely to slip and lose traction Full-time AWD provides the added security of being able to instantaneously handle a change in traction or a change in direction The latest full-time AWD systems are more lightweight, more efficient and more reliable than ever before - and Subaru symmetrical full-time AWD is the example that proves this rule Result: An inherently more balanced, safer, more entertaining and more confidence-inspiring drivetrain.
Learn more about the models that come standard with Subaru symmetrical full-time AWD. About Subaru. Subaru Life.
Subaru Services. Subaru Protection Plan. All rights reserved. Jason Fenske of Engineering Explained is here to tell us just that, and he breaks down how all four of Subaru's all-wheel-drive systems function. That's right, not all AWD systems from Subaru are created equally. Cars with continuously variable transmissions receive a specific type of system, while those equipped with a manual transmission use a different setup.
The first system is the Viscous Center Differential. The second is likely the one most consumers will be acquainted with: the Active Torque Split system. The clutch pack found in the all-wheel-drive system is designed to allow for some slip, but if traction begins to falter on a certain axle, the system locks the clutch pack, applies more pressure, and sends more torque to the wheels that need it.
What makes the second system "active" is the fact the system communicates with other vehicle sensors to understand if a situation requires more torque at a certain wheel. Now, let's get to the sporty stuff. A center differential, clutch pack, and a transmission control module all work in concert—sort of like the Active Torque Split system—to send power to the wheel most in need. The holy grail of Subaru all-wheel-drive systems is, hands down, the Driver Controlled Center Differential system.
It's exclusive to the WRX STI, and it uses a planetary style and mechanical limited-slip differential and an electronic differential. Next time you feel traction slip, you now have an idea of what's going on behind the scenes to ensure every Subaru is a cut above in low-traction scenarios. Sign up to get the latest performance and luxury automotive news, delivered to your inbox daily!
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