How Subaru AWD Systems WorkJul 18th, 2017
Understanding Subaru All-Wheel Drive Will Help You Choose The Right Subaru For You
Traction dictates how well a vehicle accelerates, how it handles curves and inclines, how quickly it stops and how it performs on uneven or slick surfaces. Capturing the most traction possible is key to optimizing vehicle performance, handling and proactive safety in a variety of conditions. Here are some reasons why 4 is better than 2 in this respect - and why Subaru symmetrical full-time AWD is a better 4.
Subaru All-Wheel Drive Explainer Video
Viscous Coupling Center Differential AWD
This system is used for all models equipped with manual transmissions, excluding the WRX STI. It delivers the sporty satisfaction of quick shifts combined with an AWD system that makes the most of the available traction at all times. This system also features an efficient layout with a viscous-coupling limited slip centre differential that maintains a 50/50 front/rear torque split for optimum torque distribution, near neutral handling and surefooted performance.
Variable Torque Distribution AWD
Linked to the Sport Lineartronic® CVT and exclusive to the WRX, this AWD system delivers sportier performance and superior efficiency all at once. The centre differential adjusts front/rear torque split from 45/55 in normal conditions (for a sportier rear-biased feel) up to 50/50 when the weather worsens or the road conditions deteriorate (for maximum traction). The viscous self-locking rear differential maintains stability when more torque is sent to the rear wheels, ensuring the perfect balance of control and fun.
Active Torque Split AWD
This system employs a multi-plate transfer clutch that maintains a 60/40 front/rear torque split and uses a range of sensors to automatically adjust this split on-the-fly as conditions warrant, creating more predictable handling. The system that's linked to all Subaru models (excluding WRX) equipped with the Lineartronic® Continuously Variable Transmission (CVT), the Active Torque Split AWD places the focus on ease of operation, fuel efficiency and reliability.
Driver Controlled Center Differential (DCCD) AWD
As it's a purebred high-performance car, it follows that the Subaru WRX STI would feature the ultimate in high-performance AWD systems. The DCCD allows the driver to adjust the centre differential locking (through one manual and three automatic modes), varying the torque split from 41/59 front/rear to 50/50 to suit the mood and the conditions. The AWD system also includes a helical-type front differential and a TORSEN® rear differential, creating a triple-differential set-up that is completely unique in the industry.